what (%s) mean in printf in c

Question

In printf("abdooo,%s\n ") what does %s mean ?

And what will happen if I delete it?

Answer 1

Here is some details about printf() in C.

Long-story-short, %s is known as a string placeholder. And does exactly that: it "leaves room" for a string to be printed out.

E.g.:

    printf("%s\n", "Hello!");

would output:

    Hello!

to your terminal / console.

Of course, you could have printed "Hello!" right away, but the use of %s is in order to print out a variable's value at a given point in time:

    string test = "Hello!";
    printf("%s\n", test);

would also output:

    Hello!

Hope it's clearer!