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Factorial Number program in C is denoted by the symbol ‘!’. Factorial of a number is defined as the product of all the numbers and all positive descending integers .
The natural number (non-negative integers) which are greater than zero are used for factorial program in C.
Factorial of 5 and 3 are like this
5!=5*4*3*2*1
3!=3*2*1
Let's take an example of Factorial Number:
#include<stdio.h> int main() { int i,f=1,num; printf("Enter Your number to print factorial: "); scanf("%d",&num); for(i=1;i<=num;i++) { f=f*i; } printf("Factorial number =%d",f); return 0; }