In JavaScript, the equal sign (=) functions as an “assignment” operator, rather than as an “equal to” operator, which is distinct from algebra.
The following expression does not hold meaning in algebra:
| x = x + 5 |
In JavaScript, however, the expression is entirely logical: it assigns the result of x + 5 to x.
(This operation calculates the value of x + 5 and assigns the outcome to x. Consequently, the value of x increases by 5.)
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Note In JavaScript, the “equal to” operator is represented as ==. |