Input and Output: Learning how to take user input and display output on the screen using standard I/O functions

To take user input and display output on the screen using standard I/O functions in a programming language like C, you can use the following steps: 1. Include the necessary header file: Include the standard input/output library in your program by adding the following line at the beginning of your code: ```c #include <stdio.h> ``` 2. Take user input: Use the `scanf` function to receive user input. It allows you to read input from the user and store it in variables. For example, if you want to take an integer input, you can use the `%d` format specifier with `scanf`: ```c int number; printf("Enter a number: "); scanf("%d", &number); ``` In this example, the prompt "Enter a number: " is displayed to the user, and the entered value is stored in the `number` variable using the `&` operator.

3. Display output: To display output on the screen, you can use the `printf` function. It allows you to print formatted output to the console. For example:

```c int result = number * 2; printf("The result is: %d\n", result); ``` In this example, the calculated result is displayed along with the prompt "The result is: " using the `%d` format specifier to print the value of the `result` variable. 4. Compile and run: After writing the code, compile and run your program. Once executed, the program will prompt the user for input, read the input, perform any necessary operations, and display the output on the screen. Here's a complete example that takes a number as input and displays its square: ```c #include <stdio.h> int main() { int number; printf("Enter a number: "); scanf("%d", &number); int square = number * number; printf("The square of %d is: %d\n", number, square); return 0; } ``` This example prompts the user to enter a number, calculates its square, and then displays the result on the screen.

PREVIOUS PAGE NEXT PAGE