code for finding GCD

#include"stdio.h"
#include"conio.h"
int n1,n2;
void main()
{
  
    printf("Enter two Numbers\n");
    scanf("%d %d",&n1,&n2);
    printf("GCD of %d and %d is ",n1 , n2);
    while(n1!=n2)
    {
        if(n1>n2)
            n1=n1-n2;
        else
            n2=n2-n1;
    }
    printf("%d",n1);
    getch();
}

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