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The decrement operator (--) subtracts 1 to the operand. If it is placed after the operand, it returns the value before the decrement. If it is placed before the operand, it returns the value after the decrement.
- Overview
- Description
- Browser compatibility
- See also
The decrement (--) operator decrements (subtracts one from) its operand and returns the value before or after the decrement, depending on where the operator is placed.
The -- operator is overloaded for two types of operands: number and BigInt. It first coerces the operand to a numeric value and tests the type of it. It performs BigInt decrement if the operand becomes a BigInt; otherwise, it performs number decrement.
If used postfix, with operator after operand (for example, x--), the decrement operator decrements and returns the value before decrementing.
If used prefix, with operator before operand (for example, --x), the decrement operator decrements and returns the value after decrementing.
The decrement operator can only be applied on operands that are references (variables and object properties; i.e. valid assignment targets). --x itself evaluates to a value, not a reference, so you cannot chain multiple decrement operators together.
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•Addition (+)
•Subtraction (-)
•Division (/)
•Multiplication (*)
•Remainder (%)
•Exponentiation (**)
398. One of the tips for jslint tool is: ++ and --. The ++ (increment) and -- (decrement) operators have been known to contribute to bad code by encouraging excessive trickiness. They are second only to faulty architecture in enabling to viruses and other security menaces. There is a plusplus option that prohibits the use of these operators.
JavaScript Operators. Operators are used to assign values, compare values, perform arithmetic operations, and more. There are different types of JavaScript operators: Arithmetic Operators. Assignment Operators. Comparison Operators. Logical Operators. Conditional Operators. Type Operators.
The JavaScript Increment and Decrement Operators useful to increase or decrease the value by 1. For instance, Incremental operator ++ used to increase the existing variable value by 1 (x = x + 1). The decrement operator – – is used to decrease or subtract the existing value by 1 (x = x – 1). The syntax for both the increment and decrement ...
i++ (Post-increment): The operator returns the variable value first (i.e, i value) then only i value will incremented by 1. –i (Pre decrement): It decrements the value of i even before assigning it to the variable i. i– (Post decrement): The JavaScript operator returns the variable value first (i.e., i value), then only i value decrements ...
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Feb 23, 2023 · Comparison Operators. We use the increment & decrement operators to increase or decrease the variable ‘s value by one. JavaScript uses the ++ (increment) and — (decrement) to denote them. We can either prefix or postfix these operators. Increment & decrement operators operate on a single operand. Hence they are unary operators.
