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Code Conversion

# Convert kelvin to fahrenheit

Temperature conversion is an essential aspect of many scientific and everyday calculations. Different temperature scales are used in various parts of the world and different contexts. Kelvin (K) and Fahrenheit (°F) are two commonly used temperature scales. Kelvin is an absolute temperature scale used primarily in scientific fields, while Fahrenheit is often used in the United States for weather and temperature reporting. Converting temperatures from Kelvin to Fahrenheit is important when working with different units of measurement.

## Problem Statement and Description

The task is to convert a temperature given in Kelvin to its equivalent value in Fahrenheit. Fahrenheit is a temperature scale commonly used in the United States. The conversion formula from Kelvin to Fahrenheit is `fahrenheit = (kelvin - 273.15) * (9/5) + 32`. This formula first subtracts 273.15 from the Kelvin temperature to get the equivalent temperature in Celsius, then multiplies by 9/5 and adds 32 to obtain the temperature in Fahrenheit.

## Example

Let's illustrate the problem with an example. Suppose we have a temperature of 300 K that we want to convert to Fahrenheit. Using the formula:

``````Fahrenheit = (Kelvin - 273.15) * (9/5) + 32
Fahrenheit = (300 - 273.15) * (9/5) + 32
Fahrenheit ≈ 80.33``````

So, 300 K is approximately equivalent to 80.33°F.

## Idea to Solve the Problem

To solve this problem, we need to create a program that takes a temperature in Kelvin as input, applies the conversion formula, and outputs the equivalent temperature in Fahrenheit. We will define a function to perform this conversion, and the main program will call this function for different test cases.

## Pseudocode

Here's the pseudocode for the program:

``````function kelvin_to_fahrenheit(kelvin):
fahrenheit = (kelvin - 273.15) * (9 / 5.0) + 32
return fahrenheit

main:
kelvin_to_fahrenheit(1)
kelvin_to_fahrenheit(604.5)
kelvin_to_fahrenheit(280.90)``````

## Algorithm Explanation

1. Define the `kelvin_to_fahrenheit` function that takes a parameter `kelvin`.
2. Inside the function, calculate the equivalent temperature in Fahrenheit using the formula `(kelvin - 273.15) * (9/5) + 32`.
3. Return the calculated temperature in Fahrenheit.
4. In the `main` program, call the `kelvin_to_fahrenheit` function with different test cases: 1, 604.5, and 280.90.
5. Print the results.

## Program Solution

``````//C Program
//Convert kelvin to fahrenheit
#include <stdio.h>

//Find the fahrenheit by given kelvin
void kelvin_to_fahrenheit(double kelvin)
{
// Formula : (kelvin - 273.15) * (9/5) + 32
// Calculate given kelvin to fahrenheit
double fahrenheit = (kelvin - 273.15) * (9 / 5.0) + 32;
//Display result
printf("Kelvin : %lf  Fahrenheit : %lf\n", kelvin, fahrenheit);
}
int main()
{
//Simple test
kelvin_to_fahrenheit(1);
kelvin_to_fahrenheit(604.5);
kelvin_to_fahrenheit(280.90);
return 0;
}``````

#### Output

``````Kelvin : 1.000000  Fahrenheit : -457.870000
Kelvin : 604.500000  Fahrenheit : 628.430000
Kelvin : 280.900000  Fahrenheit : 45.950000``````
``````/*
Java program
Convert kelvin to fahrenheit
*/
class MyMath
{
//Find the fahrenheit by given kelvin
public void kelvin_to_fahrenheit(double kelvin)
{
// Formula : (kelvin - 273.15) * (9/5) + 32
// Calculate given kelvin to fahrenheit
double fahrenheit = (kelvin - 273.15) * (9 / 5.0) + 32;
System.out.print("Kelvin : " + kelvin + " fahrenheit : " + fahrenheit + "\n");
}
public static void main(String[] args)
{
MyMath obj = new MyMath();
//Simple test
obj.kelvin_to_fahrenheit(1);
obj.kelvin_to_fahrenheit(604.5);
obj.kelvin_to_fahrenheit(280.90);
}
}``````

#### Output

``````Kelvin : 1.0 fahrenheit : -457.86999999999995
Kelvin : 604.5 fahrenheit : 628.4300000000001
Kelvin : 280.9 fahrenheit : 45.95``````
``````/*
C++ program
Convert kelvin to fahrenheit
*/
#include<iostream>

using namespace std;
class MyMath
{
public:
//Find the fahrenheit by given kelvin
void kelvin_to_fahrenheit(double kelvin)
{
// Formula : (kelvin - 273.15) * (9/5) + 32
// Calculate given kelvin to fahrenheit
double fahrenheit = (kelvin - 273.15) * (9 / 5.0) + 32;
cout << "Kelvin : " << kelvin << " fahrenheit : " << fahrenheit << "\n";
}
};
int main()
{
MyMath obj ;
//Simple test
obj.kelvin_to_fahrenheit(1);
obj.kelvin_to_fahrenheit(604.5);
obj.kelvin_to_fahrenheit(280.90);
return 0;
}``````

#### Output

``````Kelvin : 1 fahrenheit : -457.87
Kelvin : 604.5 fahrenheit : 628.43
Kelvin : 280.9 fahrenheit : 45.95``````
``````/*
C# program
Convert kelvin to fahrenheit
*/
using System;
class MyMath
{
//Find the fahrenheit by given kelvin
public void kelvin_to_fahrenheit(double kelvin)
{
// Formula : (kelvin - 273.15) * (9/5) + 32
// Calculate given kelvin to fahrenheit
double fahrenheit = (kelvin - 273.15) * (9 / 5.0) + 32;
Console.Write("Kelvin : " + kelvin + " fahrenheit : " + fahrenheit + "\n");
}
public static void Main(String[] args)
{
MyMath obj = new MyMath();
//Simple test
obj.kelvin_to_fahrenheit(1);
obj.kelvin_to_fahrenheit(604.5);
obj.kelvin_to_fahrenheit(280.90);
}
}``````

#### Output

``````Kelvin : 1 fahrenheit : -457.87
Kelvin : 604.5 fahrenheit : 628.43
Kelvin : 280.9 fahrenheit : 45.95``````
``````<?php
/*
Php program
Convert kelvin to fahrenheit
*/
class MyMath
{
//Find the fahrenheit by given kelvin
public	function kelvin_to_fahrenheit(\$kelvin)
{
// Formula : (kelvin - 273.15) * (9/5) + 32
// Calculate given kelvin to fahrenheit
\$fahrenheit = (\$kelvin - 273.15) * (9 / 5.0) + 32;
echo "Kelvin : ". \$kelvin ." fahrenheit : ". \$fahrenheit ."\n";
}
}

function main()
{
\$obj = new MyMath();
//Simple test
\$obj->kelvin_to_fahrenheit(1);
\$obj->kelvin_to_fahrenheit(604.5);
\$obj->kelvin_to_fahrenheit(280.90);
}
main();``````

#### Output

``````Kelvin : 1 fahrenheit : -457.87
Kelvin : 604.5 fahrenheit : 628.43
Kelvin : 280.9 fahrenheit : 45.95``````
``````/*
Node Js program
Convert kelvin to fahrenheit
*/
class MyMath
{
//Find the fahrenheit by given kelvin
kelvin_to_fahrenheit(kelvin)
{
// Formula : (kelvin - 273.15) * (9/5) + 32
// Calculate given kelvin to fahrenheit
var fahrenheit = (kelvin - 273.15) * (9 / 5) + 32;
process.stdout.write("Kelvin : " + kelvin + " fahrenheit : " + fahrenheit + "\n");
}
}

function main()
{
var obj = new MyMath();
//Simple test
obj.kelvin_to_fahrenheit(1);
obj.kelvin_to_fahrenheit(604.5);
obj.kelvin_to_fahrenheit(280.90);
}
main();``````

#### Output

``````Kelvin : 1 fahrenheit : -457.86999999999995
Kelvin : 604.5 fahrenheit : 628.4300000000001
Kelvin : 280.9 fahrenheit : 45.95``````
``````#   Python 3 program
#   Convert kelvin to fahrenheit

class MyMath :
# Find the fahrenheit by given kelvin
def kelvin_to_fahrenheit(self, kelvin) :
#  Formula : (kelvin - 273.15) * (9/5) + 32
#  Calculate given kelvin to fahrenheit
fahrenheit = (kelvin - 273.15) * (9 / 5) + 32
print("Kelvin : ", kelvin ," fahrenheit : ", fahrenheit ,"\n", end = "")

def main() :
obj = MyMath()
# Simple test
obj.kelvin_to_fahrenheit(1)
obj.kelvin_to_fahrenheit(604.5)
obj.kelvin_to_fahrenheit(280.90)

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

#### Output

``````Kelvin :  1  fahrenheit :  -457.86999999999995
Kelvin :  604.5  fahrenheit :  628.4300000000001
Kelvin :  280.9  fahrenheit :  45.95``````
``````#   Ruby program
#   Convert kelvin to fahrenheit

class MyMath

# Find the fahrenheit by given kelvin
def kelvin_to_fahrenheit(kelvin)

#  Formula : (kelvin - 273.15) * (9/5) + 32
#  Calculate given kelvin to fahrenheit
fahrenheit = (kelvin - 273.15) * (9 / 5.0) + 32
print("Kelvin : ", kelvin ," fahrenheit : ", fahrenheit ,"\n")
end
end
def main()

obj = MyMath.new()
# Simple test
obj.kelvin_to_fahrenheit(1)
obj.kelvin_to_fahrenheit(604.5)
obj.kelvin_to_fahrenheit(280.90)
end
main()``````

#### Output

``````Kelvin : 1 fahrenheit : -457.86999999999995
Kelvin : 604.5 fahrenheit : 628.4300000000001
Kelvin : 280.9 fahrenheit : 45.95
``````
``````/*
Scala program
Convert kelvin to fahrenheit
*/
class MyMath
{
//Find the fahrenheit by given kelvin
def kelvin_to_fahrenheit(kelvin: Double): Unit = {
// Formula : (kelvin - 273.15) * (9/5) + 32
// Calculate given kelvin to fahrenheit
var fahrenheit: Double = (kelvin - 273.15) * (9 / 5.0) + 32;
print("Kelvin : " + kelvin + " fahrenheit : " + fahrenheit + "\n");
}
}
object Main
{
def main(args: Array[String]): Unit = {
var obj: MyMath = new MyMath();
//Simple test
obj.kelvin_to_fahrenheit(1);
obj.kelvin_to_fahrenheit(604.5);
obj.kelvin_to_fahrenheit(280.90);
}
}``````

#### Output

``````Kelvin : 1.0 fahrenheit : -457.86999999999995
Kelvin : 604.5 fahrenheit : 628.4300000000001
Kelvin : 280.9 fahrenheit : 45.95``````
``````/*
Swift program
Convert kelvin to fahrenheit
*/
class MyMath
{
//Find the fahrenheit by given kelvin
func kelvin_to_fahrenheit(_ kelvin: Double)
{
// Formula : (kelvin - 273.15) * (9/5) + 32
// Calculate given kelvin to fahrenheit
let fahrenheit: Double = (kelvin - 273.15) * (9 / 5.0) + 32;
print("Kelvin : ", kelvin ," fahrenheit : ", fahrenheit ,"\n", terminator: "");
}
}
func main()
{
let obj: MyMath = MyMath();
//Simple test
obj.kelvin_to_fahrenheit(1);
obj.kelvin_to_fahrenheit(604.5);
obj.kelvin_to_fahrenheit(280.90);
}
main();``````

#### Output

``````Kelvin :  1.0  fahrenheit :  -457.87
Kelvin :  604.5  fahrenheit :  628.43
Kelvin :  280.9  fahrenheit :  45.95``````

## Time Complexity

The time complexity of this program is constant for each conversion, as it involves simple arithmetic operations (subtraction, multiplication, and addition). The number of operations remains the same regardless of the input Kelvin temperature. Thus, the time complexity is O(1).

## Comment

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