By | 03.11.2016

# Find HCF of two numbers

Write a C program to find HCF of two numbers. Here’s simple program to find HCF of two numbers in C Programming Language.

The highest common factor(HCF) of two or more integers, is the largest positive integer that divides the numbers without a remainder. HCF is also known as greatest common divisor(GCD) or greatest common factor(GCF).

Below is the source code for C program to find HCF of two numbers which is successfully compiled and run on Windows System to produce desired output as shown below :

### SOURCE CODE : :

```/*   C program to find HCF of two numbers  */

#include <stdio.h>

//function to find HCF of two number
int findHcf(int a,int b)
{
int temp;

if(a==0 || b==0)
return 0;
while(b!=0)
{
temp = a%b;
a    = b;
b    = temp;
}
return a;
}
int main()
{
int a,b;
int hcf;

printf("Enter first number :: ");
scanf("%d",&a);
printf("\nEnter second number :: ");
scanf("%d",&b);

hcf=findHcf(a,b);
printf("\nHCF (Highest Common Factor) of %d,%d is: %d\n",a,b,hcf);

return 0;
}```

### OUTPUT : :

```/*   C program to find HCF of two numbers  */

Enter first number :: 12

Enter second number :: 30

HCF (Highest Common Factor) of 12,30 is: 6```

Above is the source code for C program to find HCF of two numbers which is successfully compiled and run on Windows System.The Output of the program is shown above .

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