Basic program #2
2. Read any number and find factorial of a number. (Using Loop) #include <stdio.h> int main() { int n, i; unsigned long long factorial = 1; printf("Enter an integer to find it's factorial: "); scanf("%d",&n); // show error if the user enters a negative integer if (n < 0) printf("Error! Factorial of a negative number doesn't exist."); else { i=1; while(i<=n) { factorial *= i; // factorial = factorial*i; i++; ...