What does endl mean in C++?

endl in C++ stands for "end line". It's used to move the output to the next line, just like pressing Enter on the keyboard.

For example:

cout << number1 << endl;

This prints the value of number1, then moves the cursor to the next line before printing anything else.

We can clearly see this in the practice exercise:

int number1 = 89;
int number2 = 313.78;

cout << number1 << endl;
cout << number2;

Output with endl:

89
313.78

Without endl (if we wrote cout << number1;):

89313.78

So endl helps keep output clean and readable by separating it into lines.