These are just your typical math operators. Very important in any programming language. Know them well!

let x = 5;
let y = 10;
x + y; //returns 15
y - x; //returns 5
x * y; //returns 50
y / x; //returns 2
x % 2; //returns 1
x++; //returns 6
x--; //returns 4

+ Operator performs concatenation operation when one of the operands is of string type.

The following example shows how + operator performs operation on operands of different data types.

let a = 5, b = "Hello ", c = "World!", d = 10;
a + b; // "5Hello "
b + c; // "Hello World!"
a + d; // 15

⚠️

When concatenating a number with a string, it won't actually do math. Only when a number is added with another number will it do math.

Practice

You can add practice problems here if you want. Follow the format below.