How to assign a variable im getting confused

Question

help getting confused

Answer 1

The first step is to declare the variable:
int x;
Then you assign a value:
x=15;
This can be done with one expression:
int x=15;

Answer 2

https://code.sololearn.com/cFW2h4sRF11w/?ref=app

Answer 3

still dont have idea

Answer 4

you need a variable, a variable must start by a letter example a ab a1...
you need to choose type:
integer without , example 1
float with virgule , example 1,5
you can declare it by 2 method:
1)
int a=20;

2)
int a;
a=20;

check my code up

Answer 5

where

Answer 6

https://code.sololearn.com/cFW2h4sRF11w/?ref=app

Answer 7

click on the link then run it