Swap Two Numbers in C

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  Swap Two Numbers in C In this example, you will learn to swap two numbers in C programming using two different techniques. To understand this example, you should have the knowledge of the following C programming topics: C Data Types C Programming Operators C Input Output (I/O) Swap Numbers Using Temporary Variable # include <stdio.h> int main () { double first, second, temp; printf ( "Enter first number: " ); scanf ( "%lf" , &first); printf ( "Enter second number: " ); scanf ( "%lf" , &second); // Value of first is assigned to temp temp = first; // Value of second is assigned to first first = second; // Value of temp (initial value of first) is assigned to second second = temp; printf ( "\nAfter swapping, firstNumber = %.2lf\n" , first); printf ( "After swapping, secondNumber = %.2lf" , second); return 0 ; } Output ...
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C Program to Print an Integer (Entered by the User)

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

In this example, the integer entered by the user is stored in a variable and printed on the screen.

To understand this example, you should have the knowledge of the following C programming topics:

  • C Variables, Constants and Literals
  • C Data Types
  • C Input Output (I/O)

Program to Print an Integer

#include <stdio.h>
int main() {   
    int number;
   
    printf("Enter an integer: ");  
    
    // reads and stores input
    scanf("%d", &number);

    // displays output
    printf("You entered: %d", number);
    
    return 0;
}

Terminal Code :


Output

Enter an integer: 25
You entered: 25
Terminal Output :

In this program, an integer variable number is declared.

int number;
Then, the user is asked to enter an integer number. This number is stored in the number variable.
printf("Enter an integer: ");
scanf("%d", &number);

Finally, the value stored in number is displayed on the screen using printf().
printf("You entered: %d", number);

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