This program demonstrates how to read input from the keyboard and display it on the screen using standard input and output functions.

#include <stdio.h>

int main()
{
    int number;
    printf("Enter a number: ");
    scanf("%d", &number);
    printf("You entered: %d\n", number);
    return 0;
}

Output:
Enter a number: 10
You entered: 10

scanf() is used to read input from standard input (keyboard). The format specifier %d indicates that an integer value is expected.

The variable address is passed using &number, allowing scanf() to store the input value in memory.

printf() is used to display the entered value. The same format specifier %d is used to print the integer.

Execution starts from main() and the program terminates after returning 0.