C Program to Find HCF of Two Numbers without Recursion

The following C program using iteration finds the HCF of two entered integers. The HCF stands for Highest Common Factor.

Here is the source code of the C program to find the HCF of two entered integers. The C program is successfully compiled and run on a Linux system. The program output is also shown below.

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/*
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 * C Program to find HCF of a given Number without using Recursion

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 */
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```
#include <stdio.h>
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int hcf(int, int);
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int main()
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{
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    int a, b, result;
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    printf("Enter the two numbers to find their HCF: ");

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    scanf("%d%d", &a, &b);
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    result = hcf(a, b);
```

    printf("The HCF of %d and %d is %d.\n", a, b, result);

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    return 0;
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}
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int hcf(int a, int b)
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{
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    while (a != b)
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    {
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        if (a > b)
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        {
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            a = a - b;
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        }
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        else
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        {
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            b = b - a;
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        }
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    }
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    return a;
```
```
}
```

$ cc pgm31.c
$ a.out
Enter the two numbers to find their HCF: 24 36
The HCF of 24 and 36 is 12.

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If you wish to look at other example programs on Mathematical Functions, go to C Programming Examples on Mathematical Functions. If you wish to look at programming examples on all topics, go to C Programming Examples.

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