Hello! Why does fgets inserts also a new line character inside string?

Question

Can someone explan me why when i use fgets to read a string from a file, it stores the data but also a new line character?
When i print, lets say, 2 names with printf like this printf("%s", john);
printf("%s", mary);
The output is:
John
Mary
But when i print like this:
printf("%s\n", john);
printf("%s\n", mary);
The output is:
John

Mary

Like this
Many thanks

Answer 1

Thanks to all of you so much. It makes sense now

Answer 2

\n is what is creating your newline. That is called an escape sequence.