In this example, we’ll learn How to find GCD in C++.
Find GCD using while loop
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#include <iostream> using namespace std; int main() { int n1, n2; cout << "Enter two numbers: "; cin >> n1 >> n2; while(n1 != n2) { if(n1 > n2) n1 -= n2; else n2 -= n1; } cout << "HCF = " << n1; return 0; } |
Find HCF/GCD using for loop
C++ Code:
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#include <iostream> using namespace std; int main() { int n1, n2, hcf; cout << "Enter two numbers: "; cin >> n1 >> n2; // Swapping variables n1 and n2 if n2 is greater than n1. if ( n2 > n1) { int temp = n2; n2 = n1; n1 = temp; } for (int i = 1; i <= n2; ++i) { if (n1 % i == 0 && n2 % i ==0) { hcf = i; } } cout << "HCF = " << hcf; return 0; } |
Output:
