how to read keyboard input in c

Reading Keyboard Input in C

To read keyboard input in C, you can use the scanf function from the stdio.h library. Here are the steps to read keyboard input in C:

1. Include the necessary header file: c #include <stdio.h>

2. Declare variables to store the input: c int num; char ch;

3. Use scanf to read input from the keyboard: ```c printf("Enter an integer: "); scanf("%d", &num);

printf("Enter a character: "); scanf(" %c", &ch); ```

• In the first scanf statement, %d is the format specifier for an integer. The & operator is used to get the address of the variable num where the input will be stored.

• In the second scanf statement, %c is the format specifier for a character. Note the space before %c in the format string. This is used to consume any whitespace characters (like newline) left in the input buffer after the previous input.

• Use the input values as needed: c printf("You entered: %d and %c\n", num, ch);

• In this example, the input values are printed back to the console.

That's it! You have successfully read keyboard input in C using scanf.

Example:

#include <stdio.h>

int main() {
    int num;
    char ch;

    printf("Enter an integer: ");
    scanf("%d", &num);

    printf("Enter a character: ");
    scanf(" %c", &ch);

    printf("You entered: %d and %c\n", num, ch);

    return 0;
}

When you run this program, it will prompt you to enter an integer and a character. After you provide the input, it will display the values you entered.

Note: It's important to handle input validation and error checking when reading user input to ensure the program behaves as expected.