Many times i is used as a name for variable but we encourage you to use more meaningful values like index, count. With the initialization part, we set the starting value for our loop variable This is a variable that should change with every iteration. It enables us to work with a numeric array, counting numbers.įor loop has 3 parts: initialization, condition, and final-expression.
for loop in JavaScriptįor loop is one of the fundamental loops in all the languages. The list of loops in JavaScript is growing from year to year, most additions are made for easier use with array and other types of data. You should also take a look at our “ What is JavaScript” article, just to cover all the basics.Īll the types have their own purpose and we will explain them one by one, later on, we also have an example you can use on a simple web page. Loops are also great for counting, let's say you need to show years from 1970 up to 2019, you can use a for loop for adding those elements. Imagine that we need to bake 20 cakes we would not have a recipe that is made for 20 cakes but a single recipe, that we then repeat 20 times. Most of the time this means that we repeat some kind of instructions for different cases.
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