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Javascript declaring a variable inside the initialization step

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by vsasikalabe dot icon Updated: Mar 7, 2023

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Each programming language has rules to store data in memory for operating on that data. Now, the memory location has some name to store and access this data, called "Variable". 


Variables defined with let  

  • It cannot be Redeclared.  
  • Must be Declared before use.  
  • It has a block Scope.  
  • It is used for variable declaration in javascript. 

But the difference between them is that var- Function scoped and let-Block scoped. Variables are declared with the var keyword, and the values are available throughout the function. 

A variable name should have a clean and meaningful word to describe the data it stores. In programming, Variable naming is one of the most complex and important skills. Most of the time is spent modifying and extending an existing code in real time without writing something completely from scratch. When the variables have good names, finding information is much easier. Before declaring it, please consider the right name for a variable. 

  • Use human-readable names like userName or shopping cart. 
  • Avoid short names or abbreviations like a, b, and c. 
  • Make names maximally descriptive and concise. Bad names declarations are data and value. Such names say nothing about the variable. 


Here is an example of how to declare a Javascript Variable inside the initialization step: 

Preview of the output that you will get on running this code from your IDE.

Code

Javascript declaring a variable inside the initialization step

JavaScriptdotLines of Code : 11dotLicense : Strong Copyleft (CC BY-SA 4.0)

for (var varvar = 0; varvar < 3; ++varvar) {
    setTimeout(() => {
        console.log(`varvar = ${varvar}`);
    }, 10);
}

for (let letvar = 0; letvar < 3; ++letvar) {
    setTimeout(() => {
        console.log(`letvar = ${letvar}`);
    }, 20);
}

Instructions

Follow the steps carefully to get the output easily.

  1. Download and Install VS Code on your Desktop.
  2. Open the VS Code and install Javascript ES6 Code Snippet and Code Runner from Extensions.
  3. Open the new file and save as filename.js
  4. Copy the code using the "Copy" button above, and paste it in your javascript file.
  5. Run the code using (ctr+alt+N) Run button.


I hope you found this useful. I have added version information in the following sections.


I found this code snippet by searching for ' Javascript declaring a variable inside the initialization step' in kandi. You can try any such use case!

Environment Tested

I tested this solution in the following versions. Be mindful of changes when working with other versions.

  1. The solution is created in VS Code 1.73.1 version.
  2. JavaScript (ES6) code snippets v1.8.0
  3. Code Runner v0.11.8


Using this solution, we are able to do Javascript declaring a variable inside the initialization step with simple steps. This process also facilities an easy way to use, hassle-free method to create a hands-on working version of code which would help us to do Javascript declaring a variable inside the initialization step.

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