Operators

Operators are the symbols between values that allow different operations like addition, subtraction, multiplication, and more. JavaScript has dozens of operators, so let’s focus on the ones you’re likely to see most often.

The + operator adds two numbers.

The - operator subtracts one number from another.

The * operator multiplies two numbers. Notice it’s an asterisk and not the × symbol commonly used in math.

The / operator divides one number by another. Notice it’s a forward slash and not the ÷ symbol commonly used in math.

JavaScript expressions follow an order of operations, so even though + is written first in the following example, the multiplication happens first between the last two numbers and *.

If want more control over the order, that’s where the grouping operator comes in handy.

() operator groups other values and operations. Code located between parentheses evaluates first as JavaScript solves each operation moving from left to right. Adding the grouping operator to the previous example causes 1 + 100 to evaluate first.

The + operator can also concatenate strings, which is another way of saying it can add them together.

The = operator assigns values. It’s used for setting the value of variables.