• List of C Programs
• List of All Programs

Write a Program to Calculate LCM of Two Numbers using For Loop

// C Program to Calculate LCM of Two Numbers using For Loop

/* LCM is the smallest number which is divided by both */

#include <stdio.h>

int main()
{
	int n1, n2, m, n;

	printf("Enter number 1 :--> ");
	scanf("%d", &n1);

	printf("Enter number 2 :--> ");
	scanf("%d", &n2);

	m = n1;
	n = n2;

	int number1 = n1, number2 = n2;

	for(; n1 != n2; )
	{
		if(n1 > n2)
		{
			n1 = n1 - n2;
		}
		else
		{
			n2 = n2 - n1;
		}

	}

	int gcd = n1;

	printf("LCM of %d and %d is : %d ",m, n, (number1 * number2) / gcd);

	return 0;
}

Output:

Enter number 1 :--> 25
Enter number 2 :--> 12

LCM of 25 and 12 is : 300