Posted on by Kalkicode
Code Mathematics

# Replacing one digit with other in an integer

Process of changing a specific digit occurrence within a number to a different digit. For example, if you have the number 12325 and you want to replace the occurrence of the digit 2 with the digit 6, you would end up with the number 16365.

## Program Solution

``````// C Program
// Replacing one digit with other in an integer
#include <stdio.h>

void replaceDigit(int number, int digit, int x)
{
if (x < 0 || x > 9 || digit < 0 || digit > 9)
{
// When of given digit is not valid
return;
}
int n = number;
int result = 0;
if (n < 0)
{
// Make positive
n = -n;
}
if (digit == 0 && n == 0)
{
// When zero replace by x
result = x;
}
else
{
// Auxiliary variable
int temp = 0;
int mul = 1;
while (n > 0)
{
// Get last digit of n
temp = n % 10;
if (temp == digit)
{
// Include new digit
result = (x *mul) + result;
}
else
{
result = (temp *mul) + result;
}
// Remove last digit of n
n = n / 10;
mul = mul *10;
}
if (number < 0)
{
result = -result;
}
}
// Display given numbers
printf("\n Given Number : %d", number);
printf("\n Digit %d with replace by %d", digit, x);
// Display calculated result
printf("\n Result %d ", result);
}
int main()
{
// Test A
// Given number    : 1323
// Replacing digit : 3
// Replaced by     : 9
// Result 1929
replaceDigit(1323, 3, 9);
// Test B
// Given number    : -1161
// Replacing digit : 1
// Replaced by     : 3
// Result -3363
replaceDigit(-1161, 1, 3);
// Test C
// Given number    : 71761
// Replacing digit : 7
// Replaced by     : 0
// Result 1061
replaceDigit(71761, 7, 0);
return 0;
}``````

#### Output

`````` Given Number : 1323
Digit 3 with replace by 9
Result 1929
Given Number : -1161
Digit 1 with replace by 3
Result -3363
Given Number : 71761
Digit 7 with replace by 0
Result 1061``````
``````/*
Java program
Replacing one digit with other in an integer
*/
public class Interchange
{
public void replaceDigit(int number, int digit, int x)
{
if (x < 0 || x > 9 || digit < 0 || digit > 9)
{
// When of given digit is not valid
return;
}
int n = number;
int result = 0;
if (n < 0)
{
// Make positive
n = -n;
}
if (digit == 0 && n == 0)
{
// When zero replace by x
result = x;
}
else
{
// Auxiliary variable
int temp = 0;
int mul = 1;
while (n > 0)
{
// Get last digit of n
temp = n % 10;
if (temp == digit)
{
// Include new digit
result = (x * mul) + result;
}
else
{
result = (temp * mul) + result;
}
// Remove last digit of n
n = n / 10;
mul = mul * 10;
}
if (number < 0)
{
result = -result;
}
}
// Display given numbers
System.out.print("\n Given Number : " + number );
System.out.print("\n Digit " + digit + " with replace by " + x );
// Display calculated result
System.out.print("\n Result " + result );
}
public static void main(String[] args)
{
Interchange task = new Interchange();
// Test A
// Given number    : 1323
// Replacing digit : 3
// Replaced by     : 9
// Result 1929
// Test B
// Given number    : -1161
// Replacing digit : 1
// Replaced by     : 3
// Result -3363
// Test C
// Given number    : 71761
// Replacing digit : 7
// Replaced by     : 0
// Result 1061
}
}``````

#### Output

`````` Given Number : 1323
Digit 3 with replace by 9
Result 1929
Given Number : -1161
Digit 1 with replace by 3
Result -3363
Given Number : 71761
Digit 7 with replace by 0
Result 1061``````
``````// Include header file
#include <iostream>
using namespace std;
/*
C++ program
Replacing one digit with other in an integer
*/
class Interchange
{
public: void replaceDigit(int number, int digit, int x)
{
if (x < 0 || x > 9 || digit < 0 || digit > 9)
{
// When of given digit is not valid
return;
}
int n = number;
int result = 0;
if (n < 0)
{
// Make positive
n = -n;
}
if (digit == 0 && n == 0)
{
// When zero replace by x
result = x;
}
else
{
// Auxiliary variable
int temp = 0;
int mul = 1;
while (n > 0)
{
// Get last digit of n
temp = n % 10;
if (temp == digit)
{
// Include new digit
result = (x *mul) + result;
}
else
{
result = (temp *mul) + result;
}
// Remove last digit of n
n = n / 10;
mul = mul *10;
}
if (number < 0)
{
result = -result;
}
}
// Display given numbers
cout << "\n Given Number : " << number;
cout << "\n Digit " << digit
<< " with replace by " << x;
// Display calculated result
cout << "\n Result " << result;
}
};
int main()
{
Interchange *task = new Interchange();
// Test A
// Given number    : 1323
// Replacing digit : 3
// Replaced by     : 9
// Result 1929
// Test B
// Given number    : -1161
// Replacing digit : 1
// Replaced by     : 3
// Result -3363
// Test C
// Given number    : 71761
// Replacing digit : 7
// Replaced by     : 0
// Result 1061
return 0;
}``````

#### Output

`````` Given Number : 1323
Digit 3 with replace by 9
Result 1929
Given Number : -1161
Digit 1 with replace by 3
Result -3363
Given Number : 71761
Digit 7 with replace by 0
Result 1061``````
``````// Include namespace system
using System;
/*
Csharp program
Replacing one digit with other in an integer
*/
public class Interchange
{
public void replaceDigit(int number, int digit, int x)
{
if (x < 0 || x > 9 || digit < 0 || digit > 9)
{
// When of given digit is not valid
return;
}
int n = number;
int result = 0;
if (n < 0)
{
// Make positive
n = -n;
}
if (digit == 0 && n == 0)
{
// When zero replace by x
result = x;
}
else
{
// Auxiliary variable
int temp = 0;
int mul = 1;
while (n > 0)
{
// Get last digit of n
temp = n % 10;
if (temp == digit)
{
// Include new digit
result = (x * mul) + result;
}
else
{
result = (temp * mul) + result;
}
// Remove last digit of n
n = n / 10;
mul = mul * 10;
}
if (number < 0)
{
result = -result;
}
}
// Display given numbers
Console.Write("\n Given Number : " + number);
Console.Write("\n Digit " + digit + " with replace by " + x);
// Display calculated result
Console.Write("\n Result " + result);
}
public static void Main(String[] args)
{
Interchange task = new Interchange();
// Test A
// Given number    : 1323
// Replacing digit : 3
// Replaced by     : 9
// Result 1929
// Test B
// Given number    : -1161
// Replacing digit : 1
// Replaced by     : 3
// Result -3363
// Test C
// Given number    : 71761
// Replacing digit : 7
// Replaced by     : 0
// Result 1061
}
}``````

#### Output

`````` Given Number : 1323
Digit 3 with replace by 9
Result 1929
Given Number : -1161
Digit 1 with replace by 3
Result -3363
Given Number : 71761
Digit 7 with replace by 0
Result 1061``````
``````package main
import "fmt"
/*
Go program
Replacing one digit with other in an integer
*/
func replaceDigit(number, digit, x int) {
if x < 0 || x > 9 || digit < 0 || digit > 9 {
// When of given digit is not valid
return
}
var n int = number
var result int = 0
if n < 0 {
// Make positive
n = -n
}
if digit == 0 && n == 0 {
// When zero replace by x
result = x
} else {
// Auxiliary variable
var temp int = 0
var mul int = 1
for (n > 0) {
// Get last digit of n
temp = n % 10
if temp == digit {
// Include new digit
result = (x * mul) + result
} else {
result = (temp * mul) + result
}
// Remove last digit of n
n = n / 10
mul = mul * 10
}
if number < 0 {
result = -result
}
}
// Display given numbers
fmt.Print("\n Given Number : ", number)
fmt.Print("\n Digit ", digit, " with replace by ", x)
// Display calculated result
fmt.Print("\n Result ", result)
}
func main() {

// Test A
// Given number    : 1323
// Replacing digit : 3
// Replaced by     : 9
// Result 1929
replaceDigit(1323, 3, 9)
// Test B
// Given number    : -1161
// Replacing digit : 1
// Replaced by     : 3
// Result -3363
replaceDigit(-1161, 1, 3)
// Test C
// Given number    : 71761
// Replacing digit : 7
// Replaced by     : 0
// Result 1061
replaceDigit(71761, 7, 0)
}``````

#### Output

`````` Given Number : 1323
Digit 3 with replace by 9
Result 1929
Given Number : -1161
Digit 1 with replace by 3
Result -3363
Given Number : 71761
Digit 7 with replace by 0
Result 1061``````
``````<?php
/*
Php program
Replacing one digit with other in an integer
*/
class Interchange
{
public	function replaceDigit(\$number, \$digit, \$x)
{
if (\$x < 0 || \$x > 9 || \$digit < 0 || \$digit > 9)
{
// When of given digit is not valid
return;
}
\$n = \$number;
\$result = 0;
if (\$n < 0)
{
// Make positive
\$n = -\$n;
}
if (\$digit == 0 && \$n == 0)
{
// When zero replace by x
\$result = \$x;
}
else
{
// Auxiliary variable
\$temp = 0;
\$mul = 1;
while (\$n > 0)
{
// Get last digit of n
\$temp = \$n % 10;
if (\$temp == \$digit)
{
// Include new digit
\$result = (\$x * \$mul) + \$result;
}
else
{
\$result = (\$temp * \$mul) + \$result;
}
// Remove last digit of n
\$n = (int)(\$n / 10);
\$mul = \$mul * 10;
}
if (\$number < 0)
{
\$result = -\$result;
}
}
// Display given numbers
echo("\n Given Number : ".\$number);
echo("\n Digit ".\$digit.
" with replace by ".\$x);
// Display calculated result
echo("\n Result ".\$result);
}
}

function main()
{
\$task = new Interchange();
// Test A
// Given number    : 1323
// Replacing digit : 3
// Replaced by     : 9
// Result 1929
// Test B
// Given number    : -1161
// Replacing digit : 1
// Replaced by     : 3
// Result -3363
// Test C
// Given number    : 71761
// Replacing digit : 7
// Replaced by     : 0
// Result 1061
}
main();``````

#### Output

`````` Given Number : 1323
Digit 3 with replace by 9
Result 1929
Given Number : -1161
Digit 1 with replace by 3
Result -3363
Given Number : 71761
Digit 7 with replace by 0
Result 1061``````
``````/*
Node JS program
Replacing one digit with other in an integer
*/
class Interchange
{
replaceDigit(number, digit, x)
{
if (x < 0 || x > 9 || digit < 0 || digit > 9)
{
// When of given digit is not valid
return;
}
var n = number;
var result = 0;
if (n < 0)
{
// Make positive
n = -n;
}
if (digit == 0 && n == 0)
{
// When zero replace by x
result = x;
}
else
{
// Auxiliary variable
var temp = 0;
var mul = 1;
while (n > 0)
{
// Get last digit of n
temp = n % 10;
if (temp == digit)
{
// Include new digit
result = (x * mul) + result;
}
else
{
result = (temp * mul) + result;
}
// Remove last digit of n
n = parseInt(n / 10);
mul = mul * 10;
}
if (number < 0)
{
result = -result;
}
}
// Display given numbers
process.stdout.write("\n Given Number : " + number);
process.stdout.write("\n Digit " + digit + " with replace by " + x);
// Display calculated result
process.stdout.write("\n Result " + result);
}
}

function main()
{
var task = new Interchange();
// Test A
// Given number    : 1323
// Replacing digit : 3
// Replaced by     : 9
// Result 1929
// Test B
// Given number    : -1161
// Replacing digit : 1
// Replaced by     : 3
// Result -3363
// Test C
// Given number    : 71761
// Replacing digit : 7
// Replaced by     : 0
// Result 1061
}
main();``````

#### Output

`````` Given Number : 1323
Digit 3 with replace by 9
Result 1929
Given Number : -1161
Digit 1 with replace by 3
Result -3363
Given Number : 71761
Digit 7 with replace by 0
Result 1061``````
``````#    Python 3 program
#    Replacing one digit with other in an integer
class Interchange :
def replaceDigit(self, number, digit, x) :
if (x < 0 or x > 9 or digit < 0 or digit > 9) :
#  When of given digit is not valid
return

n = number
result = 0
if (n < 0) :
#  Make positive
n = -n

if (digit == 0 and n == 0) :
#  When zero replace by x
result = x
else :
#  Auxiliary variable
temp = 0
mul = 1
while (n > 0) :
#  Get last digit of n
temp = n % 10
if (temp == digit) :
#  Include new digit
result = (x * mul) + result
else :
result = (temp * mul) + result

#  Remove last digit of n
n = int(n / 10)
mul = mul * 10

if (number < 0) :
result = -result

#  Display given numbers
print("\n Given Number : ", number, end = "")
print("\n Digit ", digit ," with replace by ", x, end = "")
#  Display calculated result
print("\n Result ", result, end = "")

def main() :
#  Test A
#  Given number    : 1323
#  Replacing digit : 3
#  Replaced by     : 9
#  Result 1929
#  Test B
#  Given number    : -1161
#  Replacing digit : 1
#  Replaced by     : 3
#  Result -3363
#  Test C
#  Given number    : 71761
#  Replacing digit : 7
#  Replaced by     : 0
#  Result 1061

if __name__ == "__main__": main()``````

#### Output

`````` Given Number :  1323
Digit  3  with replace by  9
Result  1929
Given Number :  -1161
Digit  1  with replace by  3
Result  -3363
Given Number :  71761
Digit  7  with replace by  0
Result  1061``````
``````#    Ruby program
#    Replacing one digit with other in an integer
class Interchange
def replaceDigit(number, digit, x)
if (x < 0 || x > 9 || digit < 0 || digit > 9)
#  When of given digit is not valid
return
end

n = number
result = 0
if (n < 0)
#  Make positive
n = -n
end

if (digit == 0 && n == 0)
#  When zero replace by x
result = x
else

#  Auxiliary variable
temp = 0
mul = 1
while (n > 0)
#  Get last digit of n
temp = n % 10
if (temp == digit)
#  Include new digit
result = (x * mul) + result
else

result = (temp * mul) + result
end

#  Remove last digit of n
n = n / 10
mul = mul * 10
end

if (number < 0)
result = -result
end

end

#  Display given numbers
print("\n Given Number : ", number)
print("\n Digit ", digit ," with replace by ", x)
#  Display calculated result
print("\n Result ", result)
end

end

def main()
#  Test A
#  Given number    : 1323
#  Replacing digit : 3
#  Replaced by     : 9
#  Result 1929
#  Test B
#  Given number    : -1161
#  Replacing digit : 1
#  Replaced by     : 3
#  Result -3363
#  Test C
#  Given number    : 71761
#  Replacing digit : 7
#  Replaced by     : 0
#  Result 1061
end

main()``````

#### Output

`````` Given Number : 1323
Digit 3 with replace by 9
Result 1929
Given Number : -1161
Digit 1 with replace by 3
Result -3363
Given Number : 71761
Digit 7 with replace by 0
Result 1061``````
``````/*
Scala program
Replacing one digit with other in an integer
*/
class Interchange()
{
def replaceDigit(number: Int, digit: Int, x: Int): Unit = {
if (x < 0 || x > 9 || digit < 0 || digit > 9)
{
// When of given digit is not valid
return;
}
var n: Int = number;
var result: Int = 0;
if (n < 0)
{
// Make positive
n = -n;
}
if (digit == 0 && n == 0)
{
// When zero replace by x
result = x;
}
else
{
// Auxiliary variable
var temp: Int = 0;
var mul: Int = 1;
while (n > 0)
{
// Get last digit of n
temp = n % 10;
if (temp == digit)
{
// Include new digit
result = (x * mul) + result;
}
else
{
result = (temp * mul) + result;
}
// Remove last digit of n
n = n / 10;
mul = mul * 10;
}
if (number < 0)
{
result = -result;
}
}
// Display given numbers
print("\n Given Number : " + number);
print("\n Digit " + digit + " with replace by " + x);
// Display calculated result
print("\n Result " + result);
}
}
object Main
{
def main(args: Array[String]): Unit = {
var task: Interchange = new Interchange();
// Test A
// Given number    : 1323
// Replacing digit : 3
// Replaced by     : 9
// Result 1929
// Test B
// Given number    : -1161
// Replacing digit : 1
// Replaced by     : 3
// Result -3363
// Test C
// Given number    : 71761
// Replacing digit : 7
// Replaced by     : 0
// Result 1061
}
}``````

#### Output

`````` Given Number : 1323
Digit 3 with replace by 9
Result 1929
Given Number : -1161
Digit 1 with replace by 3
Result -3363
Given Number : 71761
Digit 7 with replace by 0
Result 1061``````
``````/*
Swift 4 program
Replacing one digit with other in an integer
*/
class Interchange
{
func replaceDigit(_ number: Int, _ digit: Int, _ x: Int)
{
if (x < 0 || x > 9 || digit < 0 || digit > 9)
{
// When of given digit is not valid
return;
}
var n: Int = number;
var result: Int = 0;
if (n < 0)
{
// Make positive
n = -n;
}
if (digit == 0 && n == 0)
{
// When zero replace by x
result = x;
}
else
{
// Auxiliary variable
var temp: Int = 0;
var mul: Int = 1;
while (n > 0)
{
// Get last digit of n
temp = n % 10;
if (temp == digit)
{
// Include new digit
result = (x * mul) + result;
}
else
{
result = (temp * mul) + result;
}
// Remove last digit of n
n = n / 10;
mul = mul * 10;
}
if (number < 0)
{
result = -result;
}
}
// Display given numbers
print("\n Given Number : ", number, terminator: "");
print("\n Digit ", digit ," with replace by ", x, terminator: "");
// Display calculated result
print("\n Result ", result, terminator: "");
}
}
func main()
{
let task: Interchange = Interchange();
// Test A
// Given number    : 1323
// Replacing digit : 3
// Replaced by     : 9
// Result 1929
// Test B
// Given number    : -1161
// Replacing digit : 1
// Replaced by     : 3
// Result -3363
// Test C
// Given number    : 71761
// Replacing digit : 7
// Replaced by     : 0
// Result 1061
}
main();``````

#### Output

`````` Given Number :  1323
Digit  3  with replace by  9
Result  1929
Given Number :  -1161
Digit  1  with replace by  3
Result  -3363
Given Number :  71761
Digit  7  with replace by  0
Result  1061``````
``````/*
Kotlin program
Replacing one digit with other in an integer
*/
class Interchange
{
fun replaceDigit(number: Int, digit: Int, x: Int): Unit
{
if (x < 0 || x > 9 || digit < 0 || digit > 9)
{
// When of given digit is not valid
return;
}
var n: Int = number;
var result: Int = 0;
if (n < 0)
{
// Make positive
n = -n;
}
if (digit == 0 && n == 0)
{
// When zero replace by x
result = x;
}
else
{
// Auxiliary variable
var temp: Int ;
var mul: Int = 1;
while (n > 0)
{
// Get last digit of n
temp = n % 10;
if (temp == digit)
{
// Include new digit
result = (x * mul) + result;
}
else
{
result = (temp * mul) + result;
}
// Remove last digit of n
n = n / 10;
mul = mul * 10;
}
if (number < 0)
{
result = -result;
}
}
// Display given numbers
print("\n Given Number : " + number);
print("\n Digit " + digit + " with replace by " + x);
// Display calculated result
print("\n Result " + result);
}
}
fun main(args: Array < String > ): Unit
{
val task: Interchange = Interchange();
// Test A
// Given number    : 1323
// Replacing digit : 3
// Replaced by     : 9
// Result 1929
// Test B
// Given number    : -1161
// Replacing digit : 1
// Replaced by     : 3
// Result -3363
// Test C
// Given number    : 71761
// Replacing digit : 7
// Replaced by     : 0
// Result 1061
}``````

#### Output

`````` Given Number : 1323
Digit 3 with replace by 9
Result 1929
Given Number : -1161
Digit 1 with replace by 3
Result -3363
Given Number : 71761
Digit 7 with replace by 0
Result 1061``````

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