Help with // **

Question

I dont understand what // or ** mean or how the answer like that pls help

Answer 1

Please add the language in which you are asking about.. answer may vary in languages...
add some code snippets where do you find these , may better help that...
edit:
in python,
// is floor or integer division operator.
** is exponentation operator.
in c++ :
// is a single line comment command..
** is invalid.

Answer 2

I guess you are talking about Python right
So
// is called floor division
Examples
1. 7//3 = 2 while 7/3 = 2.33
8//2 = 4 while 8/2 = 4
** is called exponention operator
Examples
2**3 = 8 while 2*3 = 6
3**2 = 9 while 3**2.0 = 9.0