2. for...of statement (1) Use for...in to loop through an ordinary object The for...of statement is mainly used to loop over the properties of an iterable object. To be an iterable object, an object must implement the@@iteratormethod, which means that the object (or an object on ...
The for statement creates a loop with 3 optional expressions:for (expression 1; expression 2; expression 3) { // code block to be executed }Expression 1 is executed (one time) before the execution of the code block.Expression 2 defines the condition for executing the code block....
If you have read the previous chapter, about the for loop, you will discover that a while loop is much the same as a for loop, with statement 1 and statement 3 omitted. The loop in this example uses aforloop to collect the car names from the cars array: ...
Theforstatement in JavaScript has the same syntax as in Java and C. It has three parts: Initialization- Initializes the iterator variablei. In this example, we initializeito 0. Condition- As long as the condition is met, the loop continues to execute. In this example, we check thatiis l...
JavaScript while and do...while Loop JavaScript for...of Loop JavaScript for...in Loop JavaScript break Statement JavaScript continue StatementBefore we wrap up, let’s put your knowledge of JavaScript for loop to the test! Can you solve the following challenge? Challenge: Write a function...
This little trick will let you assign the current value and the length of the array within the for statement itself. However, this will take ahuge toll in readability. If another developer who is not accustomed to this method should view the code, it will take them a while(pun unintended...
JavaScript for (var i = 0; i < 5; i++) { if (i === 2) { break; } console.log(i); } Here's the output produced by this code: 0 1 As is evident, the console.log(i) statement executes just twice. In the third iteration, when i === 2 is true, this leads to break ...
In this article we have used foreach loops to go over elements of iterables in JavaScript. We have utilized theforEachmethod and thefor/ofstatement. Author My name is Jan Bodnar and I am a passionate programmer with many years of programming experience. I have been writing programming article...
We have seen break in the switch statement, it can jump out the switch statement. it can also be used in the loop statement. an example: function findFirstOddNumber(arr){ var result; for (var...
Therefore a for loop is used in the following JavaScript example: var names = ["Michael", "John", "Maria", "Anna"]; for (var index = 0; index < names.length; index++) { console.log(names[index]); } The for loop statement is using an index variable which is incremented by one...