JavaScript in Practice: Getting Started/

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The For Loop

The For Loop

Learn about the usage of 'for' loop along with some optimization techniques regarding loops.

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Introduction

You will now learn another loop that is perfect for iteration: the for loop. This loop combines several lines of code into one. The execution of the ‘for’ loop is identical to the ‘while’ loop:

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initialization_of_loop_variable;
while ( condition ) {
    statements;
    increment_loop_variable;
}
 
for ( initialization_of_loop_variable; condition; increment_loop_variable ) {
    statements;
}

The ‘for’ loop has everything you need in one line. You don’t have to mix your loop body with the increment of the loop variable. The execution of the ‘for’ loop is as follows:

  1. initialization_of_loop_variable
  2. check condition. If condition
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