Printf Function

The `printf` Function

The printf function is a standard library function in C that is used to format and print data to the standard output stream (usually the console or terminal).
It allows you to display formatted text and values by specifying format specifiers that indicate the type and formatting of the data.

The general syntax of the printf function is:

int printf(const char* format, ...);

The printf function takes a format string as its first argument, which is a string literal or a character array containing the text and format specifiers.
The format specifiers are denoted by % followed by a character that indicates the type of the value to be printed.

Here are some commonly used format specifiers:

%d or %i: Integer (decimal).
%f: Floating-point number.
%c: Character.
%s: String.
%p: Pointer.
%x or %X: Integer (hexadecimal).

Example

#include <stdio.h>

int main() {
    int age = 25;
    float height = 1.75;
    char grade = 'A';
    char name[] = "John";

    printf("Name: %s\n", name);
    printf("Age: %d\n", age);
    printf("Height: %.2f\n", height);
    printf("Grade: %c\n", grade);

    return 0;
}

Explanation:

The printf function is used to display the name, age, height, and grade of a person.
The format specifiers %s, %d, %.2f, and %c are used to specify the expected types of the values to be printed.

Output

Name: John
Age: 25
Height: 1.75
Grade: A

return value

Note that the printf function returns the number of characters printed, excluding the null-terminating character. If an error occurs during printing, a negative value is returned.

The printf Function​

Example​

The `printf` Function

Example