C Exercises: Find the Factorial of a number
C Recursion : Exercise-10 with Solution
Write a program in C to find the Factorial of a number using recursion.
Pictorial Presentation:
Sample Solution:
C Code:
#include<stdio.h>
int findFactorial(int);
int main()
{
int n1,f;
printf("\n\n Recursion : Find the Factorial of a number :\n");
printf("-------------------------------------------------\n");
printf(" Input a number : ");
scanf("%d",&n1);
f=findFactorial(n1);//call the function findFactorial for factorial
printf(" The Factorial of %d is : %d\n\n",n1,f);
return 0;
}
int findFactorial(int n)
{
if(n==1)
return 1;
else
return(n*findFactorial(n-1));// calling the function findFactorial to itself recursively
}
Sample Output:
Recursion : Find the Factorial of a number : ------------------------------------------------- Input a number : 5 The Factorial of 5 is : 120
Flowchart:
C Programming Code Editor:
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Previous: Write a program in C to reverse a string using recursion.
Next: Write a program in C to convert a decimal number to binary using recursion.
C Programming: Tips of the Day
Static variable inside of a function in C
The scope of variable is where the variable name can be seen. Here, x is visible only inside function foo().
The lifetime of a variable is the period over which it exists. If x were defined without the keyword static, the lifetime would be from the entry into foo() to the return from foo(); so it would be re-initialized to 5 on every call.
The keyword static acts to extend the lifetime of a variable to the lifetime of the programme; e.g. initialization occurs once and once only and then the variable retains its value - whatever it has come to be - over all future calls to foo().
Ref : https://bit.ly/3fOq7XP
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