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Ruby program to calculate the Lowest Common Multiple

Last Updated : December 15, 2025

Problem Solution

In this program, we will read two integer numbers from the user, and then we will find the Lowest Common Multiple and print the result.

Program/Source Code

The source code to calculate the Lowest Common Multiple is given below. The given program is compiled and executed successfully.

# Ruby program to calculate the 
# Lowest Common Multiple

num1=0
num2=0
rem=0
lcm=0
x=0
y=0

print "Enter number1: ";
num1 = gets.chomp.to_i;  

print "Enter number2: ";
num2 = gets.chomp.to_i;  

if (num1 > num2) 
    x = num1;
    y = num2;
else 
    x = num2;
    y = num1;
end

rem = x % y;

while (rem != 0) 
    x = y;
    y = rem;
    rem = x % y;
end

lcm = num1 * num2 / y;

print "Lowest Common Multiple is: ",lcm;

Output

Enter number1: 125
Enter number2: 10
Lowest Common Multiple is: 250

Explanation

In the above program, we created six variables num1, num2, rem, lcm , x, y initialized with 0. Then we read values num1 and num2 from the user. After that, we found the Lowest Common Multiple and printed the result.

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