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Tutorial: Introduction to JavaScript

By Aaron Weiss

Operators

string

Strings can be compared using the comparison operators. Additionally, you can concatenate strings using the + operator.

"dog" + "bert"

yields

"dogbert"

assignment

The assignment operator (=) lets you assign a value to a variable. You can assign any value to a variable, including another variable (whose value will be assigned). Several shorthand assignment operators allow you to perform an operation and assign its result to a variable in one step.

=	Assigns the value of the righthand operand to the variable on the left. Example: total=100; Example: total=(price+tax+shipping)
+= (also -=, *=, /=)	Adds the value of the righthand operand to the lefthand variable. Example: total+=shipping (adds value of shipping to total and assigned result to total)
&= (also \|=)	Assigns result of (lefthand operand && righthand operand) to lefthand operand.

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