C Progarmming Examples

C Program to Check Whether a Number is Positive or Negative

C Program to Check Whether a Number is Positive or Negative In this example, you will learn to check whether a number (entered by the user) is negative or positive. To understand this example, you should have the knowledge of following C programming topics: C Programming Operators C if...else Statement This program takes a number from the user and checks whether that number is either positive or negative or zero. Example #1: Check if a Number is Positive or Negative Using if...else #include <stdio.h> int main () { double number ; printf ( "Enter a number: " ); scanf ( "%lf" , & number ); if ( number <= 0.0 ) { if ( number == 0.0 ) printf ( "You entered 0." ); else printf ( "You entered a negative number." ); } else printf ( "You entered a positive num...

C Program to Print an Integer (Entered by the User)

C Program to Print an Integer (Entered by the User) In this program, integer entered by the user is stored in a variable. Then, that variable is displayed on the screen using printf() function. To understand this example, you should have the knowledge of following C programming topics: C Programming Constants and Variables C Programming Data Types C Input Output (I/O) Program to Print an Integer #include <stdio.h> int main () { int number ; // printf() dislpays the formatted output printf ( "Enter an integer: " ); // scanf() reads the formatted input and stores them scanf ( "%d" , & number ); // printf() displays the formatted output printf ( "You entered: %d" , number ); return 0 ; } Output Enter a integer: 25 You entered: 25 In this program, an integer variable number is declared. ...

C Program to Swap Two Numbers

C Program to Swap Two Numbers This example contains two different techniques to swap numbers in C programming. The first program uses temporary variable to swap numbers, whereas the second program doesn't use temporary variables. To understand this example, you should have the knowledge of following C programming topics: C Programming Data Types C Programming Operators C Input Output (I/O) Example 1: Program to Swap Numbers Using Temporary Variable #include <stdio.h> int main () { double firstNumber , secondNumber , temporaryVariable ; printf ( "Enter first number: " ); scanf ( "%lf" , & firstNumber ); printf ( "Enter second number: " ); scanf ( "%lf" ,& secondNumber ); // Value of firstNumber is assigned to temporaryVariable temporaryVariable = firstNumber ; // Value of secondNumber...

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