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Calculating Factorial Using For Loop in C

Factorial: its a mathematical function defined as 4!=4x3x2x1=120. Yes just like that. It will multiply all numbers before the given numbers till 1(Worst definition ever).


Method: calculating factorial is pretty straight forward. We will use a loop, which will loop from 1 to given number. store our result in a number that was initially 1 (not 0 ,cause 0 multiplied by anything will be zero).
Code in C:
#include<stdio.h>
int factorial(int x)
{
    int result=1;//initialize to 1
    int i;
    for(i=1;i<=x;i++)
    {
        result=result*i;
    }
    return(result);
}
int main()
{
    int n;
    printf("\n Enter the number to calculate its factorial=");
    scanf("%d",&n);
    printf("\n Factorial of number =%d",factorial(n));
}
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