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Find Factorial of a Number. C

#c #factorial #numbers

factorial of n (n!) = 1 * 2 * 3 * 4....n

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#include <stdio.h>
int main() {
    int n, i;
    unsigned long long fact = 1;
    printf("Enter an integer: ");
    scanf("%d", &n);
​
    // shows error if the user enters a negative integer
    if (n < 0)
        printf("Error! Factorial of a negative number doesn't exist.");
    else {
        for (i = 1; i <= n; ++i) {
            fact *= i;
        }
        printf("Factorial of %d = %llu", n, fact);
    }
​
    return 0;
}

Output result

Enter an integer: 10
Factorial of 10 = 3628800

C

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Find Factorial of a Number. C

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