C Progarmming Examples

C Program to Find Factorial of a Number Using Recursion

C Program to Find Factorial of a Number Using Recursion Example to find factorial of a non-negative integer (entered by the user) using recursion. To understand this example, you should have the knowledge of following C programming topics: C Programming Functions C User-defined functions C Recursion The factorial of a positive number n is given by: factorial of n (n!) = 1*2*3*4....n The factorial of a negative number doesn't exist. And the factorial of 0 is 1. You will learn to find the factorial of a number using recursion in this example. Visit this page to learn, how you can find the factorial of a number using loop . Example: Factorial of a Number Using Recursion #include <stdio.h> long int multiplyNumbers ( int n ); int main () { int n ; printf ( "Enter a positive integer: " ); scanf ( "%d" , & n ); printf ( "Factorial of %d = %ld...

C Program to Find Factorial of a Number

C Program to Find Factorial of a Number The factorial of a positive integer n is equal to 1*2*3*...n. You will learn to calculate the factorial of a number using for loop in this example. To understand this example, you should have the knowledge of following C programming topics: C Programming Data Types C Programming Operators C if...else Statement C Programming for Loop The factorial of a positive number n is given by: factorial of n (n!) = 1*2*3*4....n The factorial of a negative number doesn't exist. And, the factorial of 0 is 1, 0! = 1 Example: Factorial of a Number #include <stdio.h> int main () { int n , i ; unsigned long long factorial = 1 ; printf ( "Enter an integer: " ); 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 ...

C Program to Check Leap Year

C Program to Check Leap Year This program checks whether an year (integer) entered by the user is a leap year or not. To understand this example, you should have the knowledge of following C programming topics: C Programming Operators C if...else Statement A leap year is exactly divisible by 4 except for century years (years ending with 00). The century year is a leap year only if it is perfectly divisible by 400. Example: Program to Check Leap Year #include <stdio.h> int main () { int year ; printf ( "Enter a year: " ); scanf ( "%d" ,& year ); if ( year % 4 == 0 ) { if ( year % 100 == 0 ) { // year is divisible by 400, hence the year is a leap year if ( year % 400 == 0 ) printf ( "%d is a leap year." , year ); else printf ( "%d i...

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