JavaScript Keywords

JavaScript statements often start with a keyword to identify the JavaScript action to be performed. Here is a list of some of the keywords you will learn about in this tutorial:

Keyword Description
break Terminates a switch or a loop
continue Jumps out of a loop and starts at the top
debugger Stops the execution of JavaScript, and calls (if available) the debugging function
do ... while Executes a block of statements, and repeats the block, while a condition is true
for Marks a block of statements to be executed, as long as a condition is true
function Declares a function
if ... else Marks a block of statements to be executed, depending on a condition
return Exits a function
switch Marks a block of statements to be executed, depending on different cases
try ... catch Implements error handling to a block of statements
var Declares a variable

JavaScript keywords are reserved words. Reserved words cannot be used as names for variables.

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