Today, We want to share with you **gcd of two numbers in c program**.In this post we will show you **GCD Using for loop and if Statement**, hear for *Find GCD of two Numbers* we will give you demo and example for implement.In this post, we will learn about *GCD Using while loop and if-else Statement* with an example.

## gcd of two numbers in c program

There are the Following The simple About **GCD for both positive and negative numbers** Full Information With Example and source code.

As I will cover this Post with live Working example to develop **greatest common denominator**, so the how to find greatest common denominator is used for this example is following below.

### c programming β Find GCD of two Numbers

**some Good Examples with easy way to all about of the GCD Tutorials on different ways to calculate GCD of 2 datatype of the nintegers (for two positive as well as negative integers) using loops as well as if else making some statements.**

Examples on different ways to calculate greatest common divisor (gcd) of two integers (vlaue of both positive and negative integers ) using loops and decision making statements in C programing.

GCD stands for Greatest Common Divisor & HCF stands for Highest Common Factor.GCD or HCF of two interger numbers is the big or large number that some divides two of them.

hear we will show you 3 different way to find greatest common divisor (gcd).Simple calculate and method of GCD

82 = 2^{1} 41^{1}

152 = 2^{3} 19^{1}

The answer is: 2^{1} = 2

### C Program to Find GCD of two Numbers

**Example 1:**

GCD Using for loop and if Statement

#include <stdio.h> int main() { int first, second, i, gcd; printf("Enter two integers: "); scanf("%d %d", &first, &second); for(i=1; i <= first && i <= second; ++i) { // Checks if i is factor of both integers if(first%i==0 && second%i==0) gcd = i; } printf("G.C.D of %d and %d is %d", first, second, gcd); return 0; }

**Example 2:**

GCD Using while loop and if…else Statement

#include <stdio.h> int main() { int first, second; printf("Enter two positive integers: "); scanf("%d %d",&first,&second); while(first!=second) { if(first > second) first -= second; else second -= first; } printf("GCD = %d",first); return 0; }

**Example 3:**

GCD for both positive and negative numbers

#include <stdio.h> int main() { int first, second; printf("Enter two integers: "); scanf("%d %d",&first,&second); first = ( first > 0) ? first : -first; second = ( second > 0) ? second : -second; while(first!=second) { if(first > second) first -= second; else second -= first; } printf("GCD = %d",first); return 0; }

### gcd of two numbers in c program

C program to find GCD of two numbers, Recursive function to return gcd of first and second, Driver program to test above function

#include <stdio.h> int gcd(int first, int second) { if (first == 0) return second; if (second == 0) return first; if (first == second) return first; if (first > second) return gcd(first-second, second); return gcd(first, second-first); } int main() { int first = 98, second = 56; printf("GCD of %d and %d is %d ", first, second, gcd(first, second)); return 0; }

### gcd of two numbers in C++ program

#include <iostream> using namespace std; int gcd(int first, int second) { if (first == 0) return second; if (second == 0) return first; if (first == second) return first; if (first > second) return gcd(first-second, second); return gcd(first, second-first); } int main() { int first = 98, second = 56; cout<<"GCD of "<<first<<" and "<<second<<" is "<<gcd(first, second); return 0; }

### gcd of two numbers in Java program

class Test { static int gcd(int first, int second) { if (first == 0) return second; if (second == 0) return first; if (first == second) return first; if (first > second) return gcd(first-second, second); return gcd(first, second-first); } public static void main(String[] args) { int first = 98, second = 56; System.out.println("GCD of " + first +" and " + second + " is " + gcd(first, second)); } }

### gcd of two numbers in Python 3 program

def gcd(first,second): if (first == 0): return second if (second == 0): return first if (first == second): return first if (first > second): return gcd(first-second, second) return gcd(first, second-first) first = 98 second = 56 if(gcd(first, second)): print('GCD of', first, 'and', second, 'is', gcd(first, second)) else: print('not found')

### gcd of two numbers in C# program

using System; class GFG { static int gcd(int first, int second) { if (first == 0) return second; if (second == 0) return first; if (first == second) return first; if (first > second) return gcd(first - second, second); return gcd(first, second - first); } public static void Main() { int first = 98, second = 56; Console.WriteLine("GCD of " + first +" and " + second + " is " + gcd(first, second)); } }

### gcd of two numbers in PHP program

<?php function gcd($first, $second) { if ($first == 0) return $second; if ($second == 0) return $first; if($first == $second) return $first ; if($first > $second) return gcd( $first-$second , $second ) ; return gcd( $first , $second-$first ) ; } $first = 98 ; $second = 56 ; echo "GCD of $first and $second is ", gcd($first , $second) ; ?>

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