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Remainder operator – show you how to use the remainder operator ( %) to get the remainder left over when one value is divided by another value.Arithmetic operators – introduce to you the arithmetic operators including addition ( +), subtraction ( -), multiplication ( *), and division ( /).Array – introduce you to the Array type and how to manipulate array elements.reference values – understand two value types in JavaScript, including primitive and reference values, and the differences between them. Object – introduce you to the object type.String – learn about string primitive type and some basic string operations.Boolean – introduce you to the Boolean type.Octal & binary literals – provide support for binary literals and change the way to represent octal literals.Numeric Separator– show you how to make the numbers more readable by using underscores as numeric separators.Number – learn how JavaScript use the Number type to represent the integer and floating-point numbers.

Data types – introduce to you the JavaScript data types, including primitive and reference types.