Posted on by Kalkicode
Code Conversion

# Decimal to roman numeral converter in ruby

Ruby program for Decimal to roman numeral converter. Here mentioned other language solution.

#  Ruby program for
#  Conversion from Decimal to roman number

# Display roman value of n
def self.result( n)
if (n==1)
print("I")
elsif(n==4)
print("IV")
elsif(n==5)
print("V")
elsif(n==9)
print("IX")
elsif(n==10)
print("X")
elsif(n==40)
print("XL")
elsif(n==50)
print("L")
elsif(n==90)
print("XC")
elsif(n==100)
print("C")
elsif(n==400)
print("CD")
elsif(n==500)
print("D")
elsif(n==900)
print("DM")
elsif(n==1000)
print("M")
end
end
def select( number,  collection,  size)
n = 1
i = 0
i = 0
while (i < size)
if (number >= collection[i])
n = collection[i]
else
break
end
i += 1
end
result(n)
# Reduce the value of number
return number - n
end
def romanNo( number)
if (number <= 0)
# When is not a natural number
return
end
# Base case collection
collection =
[1, 4, 5, 9, 10, 40, 50, 90, 100,
400, 500, 900, 1000]
# Get the size of collection
size = collection.length
print(" " + number.to_s + " : ")
while (number > 0)
number = select(number,
collection, size)
end
# Add new line
print("\n")
end

# Test Case
romanNo(10)
romanNo(18)
romanNo(189)
romanNo(604)
romanNo(982)
romanNo(3000)

Output

10 : X
18 : XVIII
189 : CLXXXIX
604 : DCIV
982 : DMLXXXII
3000 : MMM

## Comment

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