Question

How to find the factorial of a number using recursion in C

Answer 1

#include <stdio.h>

int factorial_recursion(int n) {
    if (n == 0 || n == 1) {
        return 1;
    }
    else {
        return(n * factorial_recursion(n - 1));
    }
}

int main()
{
    printf("%d\n", factorial_recursion(5));
    
    return 0;
}



/*
run:

120

*/

 

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Answer 2

#include <stdio.h>

int factorial_recursion(int n) {
    return n ? n * factorial_recursion(n - 1) : 1;
}

int main()
{
    printf("%d\n", factorial_recursion(5));

    return 0;
}



/*
run:

120

*/

 

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