Operators (JavaScript)

Operators

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Operators

Operators let you perform mathematical calculations or all kinds of data manipulation.

Here are the main operators:

• +: Addition of two numbers
• -: Subtraction
• *: Multiplication
• /: Division
• %: Remainder of the division (modulo)
• ==: Equality between two values
• `, =`: Comparison of two numbers
• &&: "And" of two booleans
• ||: "Or" of two booleans
• !: "Not" (inverts a boolean)
• =: Assigning a variable
• +=, -=, *= etc.: Operator combined with assigning a variable

To get the quotient of an integer division, use Math.floor(a / b).

In an expression with several operators, the operators follow the usual precedence rules, so * comes before +.

Example with different operators:

You can also use parentheses, as in: (5 + 7) * 2.

Assignment operators

Besides the = operator, there are many assignment operators, such as +=, -=, *= etc., which combine a calculation and an assignment.

An example with *=, which performs a multiplication and stores the result in the same variable:

A smarter healing condition

Our current healing condition makes us heal as soon as we've lost 1 life point. We can improve it by healing only if our life is

To display the value of a variable or an expression in the fight's actions, use Debug.log(). Example: Debug.log(me.maxLife * 0.75).

❓ Quiz

What is the result of the code 10 + (5 * 7) - 20 / 4?

40 25 18 -30

What is the value of x at the end of the code let x = 10 x *= 2 x += 5 x /= 5?

5 15 22 12

What is the result of the code (true && false) || (true && true)?

1 3 true false

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