![]() It is nothing new or nothing different but just similar to the loop which you used in other programming languages. Iterate throw all keys, and push each one into the array you created. So, we also make use of for loop in Typescript. This is an where all the properties are going to live, since your new ngFor loop is going to point to this array, we gotta catch them all. When we talk about the loop then the first loop comes into everyone’s mind is for a loop. Flowchart: In the above, we can see a blueprint of how the for loop works in typescript along with the condition provided. The typical use case is to execute side effects at the end of a chain. The typescript also provides an array method known as foreach() where also works similar to the for loop but used to iterate through every item in the specified array. ![]() Unlike map (), forEach () always returns undefined and is not chainable. It calls a provided callbackFn function once for each element in an array in ascending-index order. Let’s start with the loop and array in Typescript. The forEach () method is an iterative method. Using a for loop : This is the most straightforward approach. In this tutorial, I will show you different ways to do it with examples. Using loops and using its inbuilt method forEach, we can iterate through the array elements. ![]() We used keyof typeof to set the type of Object.keys () to an array containing keys of obj. In typescript, we have multiple ways to iterate an array. The Object.keys method returns an array of the object's keys. Use the Array.forEach () method to iterate over the array. Also, check once how to write your first code in Typescript so that it can help you when you work on the Angular and React project. To iterate over an object: Use the Object.keys () method to get an array of the object's keys. ![]() ![]() So, it is recommended that before proceeding with this tutorial you must read about the overview of Typescript which contains the basic information that what Typescript is and how it converts the Typescript code into the Javascript code. Now in this tutorial, we will learn about the loop and Array in Typescript. In the previous tutorial, we had learned about the types of variables in Typescript. ![]()
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