In this Ruby example to calculate factorial of a number we are using while loop puts "Enter the number" i = 1 while i <= num #implementation of while loop puts "The factorial of #{num} is #{fact}" Output Enter the number
num=gets.chomp.to_i
fact = 1
fact *= i
i += 1
end
5
The factorial of 5 is 120
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Ruby program to Calculate the factorial of given number