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stdin 
#include <stdio.h>

int main() {
    int n, i;
    long long fact = 1;

    printf("Enter a positive integer: ");
    scanf("%d", &n);

    for(i = n; i >= 1; i--) {
        fact *= i;
    }

    printf("Factorial of %d is %lld\n", n, fact);
    return 0;
}
stdout 
Standard output is empty
https://ideone.com/4mCi9m
language:
PHP (php 7.3.5)
created:
1 day ago
visibility:
public

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