Write a function to calculate the factorial value of any integer entered through the keyboard.
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C Program To Find Factorial of a Number
Factorial of a number is the product of all the numbers preceding it. For example, Factorial of 6 is 720 (1 x 2 x 3 x 4 x 5 x 6 = 720).
In general, n objects can be arranged in n(n – 1)(n – 2) … (3)(2)(1) ways. This product is represented by the symbol n!, which is called n factorial. By convention, 0! = 1.
Video Tutorial: C Program To Find Factorial of a Number using Function
#include<stdio.h> void factorial(int); int main() { int num; printf("Enter a positive number to find Factorial\n"); scanf("%d", &num); factorial(num); return 0; } void factorial(int num) { int count, fact = 1; if(num == 0) { printf("Factorial of 0 is 1 (!0 = 1)\n"); } else { for(count = 1; count <= num; count++) { fact = fact * count; } printf("\nFactorial of %d is %d (!%d = %d)\n", num, fact, num, fact); } }
Output 1:
Enter a positive number to find Factorial
5
Factorial of 5 is 120 (!5 = 120)
Output 2:
Enter a positive number to find Factorial
4
Factorial of 4 is 24 (!4 = 24)
Output 3:
Enter a positive number to find Factorial
6
Factorial of 6 is 720 (!6 = 720)
Output 4:
Enter a positive number to find Factorial
7
Factorial of 7 is 5040 (!7 = 5040)
Output 5:
Enter a positive number to find Factorial
8
Factorial of 8 is 40320 (!8 = 40320)
Complete for loop logic to find Factorial of a number is present at C Program To Find Factorial of a Number. Watch the video without fail to understand the logic.
Note: Function factorial doesn’t return anything so its return type is void. It accepts 1 integer type argument.
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