**C program to find HCF of N numbers**

**C program to find HCF of N numbers**

### Greatest Common Divisor

In mathematics, the **greatest common divisor** (**gcd**) of two or more integers, when at least one of them is not zero, is the largest positive integer that is a divisor of both numbers. For example, the GCD of 8 and 12 is 4.

The greatest common divisor is also known as the **greatest common factor** (**gcf**), **highest common factor** (**hcf**), **greatest common measure** (**gcm**), or **highest common divisor**.

**Related Post : : C program to calculate the GCD(HCF) of number**

**Example : **

**Example :**

What is the greatest common divisor of 54 and 24?

The number 54 can be expressed as a product of two integers in several different ways:

Thus the **divisors of 54** are: **1, 2, 3, 6, 9, 18, 27, 54 **

Similarly, **the divisors of 24** are: **1, 2, 3, 4, 6, 8, 12, 24**

The numbers that these two lists share in common are the **common divisors** of 54 and 24:

**1, 2, 3, 6 .**

The greatest of these is 6. That is, the **greatest common divisor** of 54 and 24. One writes:

- Here below is the source code of the C program to find HCF of N numbers using Arrays.The program is successfully compile and run(on Codeblocks) on the windows system and produce output below :

**SOURCE CODE : :**

**SOURCE CODE : :**

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#include<stdio.h> int main() { int n,i,gcd; printf("Enter how many no.s u want to find gcd : "); scanf("%d",&n); int arr[n]; printf("\nEnter your numbers below :- \n "); for(i=0;i<n;i++) { printf("\nEnter your %d number = ",i+1); scanf("%d",&arr[i]); } gcd=arr[0]; int j=1; while(j<n) { if(arr[j]%gcd==0) { j++; } else { gcd=arr[j]%gcd; i++; } } printf("\nGCD of k no.s = %d ",gcd); return 0; } |

**OUTPUT : :**

**OUTPUT : :**

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Enter how many no.s u want to find gcd : 6 Enter your numbers below :- Enter your 1 number = 100 Enter your 2 number = 75 Enter your 3 number = 35 Enter your 4 number = 260 Enter your 5 number = 330 Enter your 6 number = 1000 GCD of k no.s = 5 |

**Related : : C Program to find GCD of a number using recursion**

else

{

gcd=arr[j]%gcd;

i++;

}

why is i++ there???