How do u add variables in java

Question

What is wrong with this
console.log(“x”)
var x=10;

Answer 1

Syntax

type variableName = value;

Answer 2

Without quotes.
var x=10;
console.log(x)

Output: 10

Answer 3

Its because here you called console.log on a string “x” while then you define a variable named x with certain value
CORRECTION:
1-define the variable first
2-Then do a function like console.log on it
3-Variable names are not written in quotes(because it will count everything in quotes as string)
var x = 10;
console.log(x)