C Program to calculate Factorial of a Number

This C program calculates the the factorial of an integer number entered by the user. The function uses for loop to calculate the factorial and returns the number. Program terminates if a non integer number is entered. This C language program uses for loop in just a single statement to calculates the factorial of integer number.

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#include <stdio.h>

int fact(int n);

int main(void) {
int current;

printf("Enter a positive integer [to terminate enter non-positive] > ");
scanf("%d", &amp;t);
while (current > 0) {
printf("The factorial of %d is %d\n", current, fact(current));
printf("Enter a positive integer [to terminate enter non-positive] > ");
scanf("%d", &amp;t);
}
}

/* n is a positive integer. The function returns its factorial */int fact(int n) {
int lcv; /* loop control variable */int p; /* set to the product of the first lcv positive integers */
for(p=1, lcv=2; lcv <= n; p=p*lcv, lcv++);
return p;
}