wat is print_with_exclamation mean? its jus a word for function or some keyword?

Answer 1

It is defined function. It first add an exclamationmark to the given string, and then prints it on the screen.

Edit:
You can use any word you want instead, but it is advised to use words which makes sense.

Answer 2

can i use different word instead of dat?

Answer 3

yes u can choose any word u want to define a function