Ruby program to check whether the given number is Armstrong

This Ruby example will check given number is Armstrong or not

puts "Enter the number"
num=gets.chomp.to_i

temp=num
sum = 0

while num!=0 #implementation of while loop
   rem=num%10
   num=num/10
   sum=sum+rem*rem*rem
end

if(temp==sum)
puts "The #{temp} is Armstrong"
else
puts "The #{temp} is not Armstrong"
end

Output

Enter the number
153
The 153 is Armstrong

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