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What is mean in javascript
What is mean in javascript




The non-null assertion operator tells the TypeScript compiler that a value typed as optional cannot be null or undefined.

  • Alternatives to using the TypeScript exclamation mark.
  • The downside of using the exclamation mark in TypeScript.
  • Popular use cases for the TypeScript exclamation mark.
  • What the exclamation mark does in TypeScript.
  • What is the TypeScript exclamation mark?.
  • We will be using these terms interchangeably in this article. The exclamation mark ! is known as the non-null assertion operator in TypeScript. For more information, check out the TypeScript docs and GitHub repo. Since publication, Microsoft released TypeScript v5, which includes the addition of decorators, support for multiple config files in extends, a -module_resolution bundler, and more. Understanding the exclamation mark in TypeScriptĮditor’s Note: This blog was reviewed for accuracy on 4 April 2023. When she's not writing code, she likes to read, listen to music, and put cute outfits together. There are seven in total ( =, +=, -=, *=, /=, %=, **= ), and mastering them all would help you go a long way.Ibiyemi Adewakun Follow Ibiyemi is a full-stack developer from Lagos. Once you have familiarized yourself with the addition assignment operator (+=) I would recommend practicing the other assignment operators. Using the JavaScript += operator would help increase code readability, and such minor changes would help while working with a group of senior developers. > 7Īs you can see, the values of ‘y’ & ‘b’ have been added to the ‘x’ & ‘a’ respectively.

    what is mean in javascript

    The Output of the above code snippet is as follows. Code using JavaScript +=: //Code using JavaScript += The assignment operator does the same in a more concise method. Here we are again taking the value on the right (y) and adding & assigning it to the value on the left (x). This method is just a shorter way of writing the following code. In case you are still confused, I shall break it down even further. The syntax of the assignment operator is quite straightforward and does not require any prerequisites.

    what is mean in javascript

    Essentially it replaces the variable = a + b syntax with a += b. This operator is not only used to add numerical values but can also be used to concatenate strings together. This is a very concise method to add two values and assign the result to a variable hence it is called the addition assignment operator. The JavaScript += operator takes the values from the right of the operator and adds it to the variable on the left.






    What is mean in javascript