C program to find factorial of number using function - FCST

C program to find factorial of number using function

Problem description

In this program take number as input & then it show the factorial of given number as output.

Problem solution

1.take a number as input.

2.declare the void Fact(int) function globally if you want or declare the function prototype  into the main() function.

3.after taking input call the function into main() .

4.then define the function definition.

5.after taking function definition for loop started in this function definition.

6. In for loop i=1 & fact=1 then fact=1. after this loop is continue and incremented by1 until the n is grater than equal to i. continuity of loop is depend on what number take as input . 

Program code:

#include<stdio.h>
void Fact(int);//function prototype declearation
int i,fact=1;//global variable declearation
int main() 
{
int n;
printf("\n enter the  number:");
scanf("%d",&n);
Fact(n);//function call
}
//function definition
void Fact(int n) 
{
for(i=1; i<=n; i++) 
{
fact=fact*i;
}
printf("\n factorial of %d is=%d",n,fact);
}
Program explanation:
1. for example we take 5 as input.
2.we declare the void Fact(int) function globally.
3.after taking function call we give the function definition outside the main function.
4. in function definition for loop started.In for loop i=1 & fact=1 then fact=1. after this loop is continue and incremented by1 until the n is grater than equal to i. 
OUTPUT