Home› C Programming Language for Problem Solving› / Programs / Program to find GCD of two numbers using the recursive and iterative method
🚀 Programming Example

Program to find GCD of two numbers using the recursive and iterative method

1,116 Views
Beginner
Code Snippet
Program to find GCD of two numbers using the recursive and iterative method

💻 Program Code

#include<stdio.h>
int GCD(int a, int b);
int gcd(int a, int b);
main()
{
	int a, b;
	printf("Enter a and b : \n");
	scanf("%d%d",&a, &b);
	printf("%d\n",GCD(a,b));
	printf("%d\n",gcd(a,b));
}/*End of main()*/


/*Recursive*/
int GCD(int a, int b)
{
	if(b==0)
		return a;
	return GCD(b, a%b);
}/*End of GCD()*/


/*Iterative*/
int gcd(int a, int b)
{
int rem;
	while(b != 0)
	{
	rem = a%b;
	a = b;
	b = rem;
	}
return a;
}/*End of gcd()*/

🖥 Program Output

                                Enter a and b :
12
15
3
3
Press any key to continue . . .
                            

📘 Explanation

Program to find GCD of two numbers using the recursive and iterative method
📚 Learning Subject

Master Programming Through Practical Examples

Improve your coding logic, problem-solving skills and programming confidence by practicing real-world examples with explanations.

🎯 How to learn from this example

First understand the algorithm carefully. Then study the program line-by-line and compare it with the output. Finally, review the explanation section to strengthen your logic and programming understanding.

🔥 Practice suggestion

Rewrite the program without looking at the code. Modify values, conditions or logic and run it again. This helps improve confidence and strengthens coding skills much faster.