In JavaScript, the equal sign (=) is an "assignment" operator, not an "equal to" operator. This is different from algebra. The following does not make sense in algebra:
x = x + 5In JavaScript, however, it makes perfect sense: it assigns the value of x + 5 to x. (It calculates the value of x + 5 and puts the result into x. The value of x is incremented by 5.)
The "equal to" operator is written like == in JavaScript.
