What does %s and %d mean in printf in the C language?

Wed-Dec-2022
1

In the printf() function in the C language, %s and %d are format specifiers that indicate the type of data being passed to the function.

%s is used to print a string (a sequence of characters), and it expects a corresponding char * argument (a pointer to a character array). For example:

c
char name[] = "John";
printf("Hello, %s!", name); // Output: Hello, John!

In this example, %s tells printf() to expect a string argument, and the name variable is passed as the argument.

%d is used to print a signed integer, and it expects a corresponding int argument. For example:

perl
int age = 25;
printf("I am %d years old.", age); // Output: I am 25 years old.

In this example, %d tells printf() to expect an integer argument, and the age variable is passed as the argument.

There are other format specifiers available in printf(), such as %f for printing floating-point numbers, %c for printing a single character, %p for printing a pointer address, and more.