Imtiaz Rayhan

In JavaScript, a closure is a function that has access to the outer (enclosing) function’s scope even after the outer function has returned. A closure is created when an inner function is defined inside an outer function and the inner function is returned or passed as a value. The inner function maintains a reference to…

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In JavaScript, hoisting is the behavior of moving declarations to the top of the current scope (the script or the function) at runtime. This means that, in JavaScript, you can use a variable before it is declared. Here is an example of how hoisting works in JavaScript: In this code, the console.log statement is executed…

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In JavaScript, scope refers to the visibility and accessibility of variables in different parts of your code. Every function has its own scope, which is the set of variables that are available for use within that function. In addition, JavaScript has a global scope, which is the set of variables that are available everywhere in…

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In JavaScript, there are several ways to declare a function. The most common way is to use the function keyword followed by the function name and a set of parentheses for the parameters. For example: Another way to declare a function is to use the function keyword followed by the function name and an arrow…

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JavaScript has many built-in functions that are available to use in your code. These functions are part of the JavaScript standard library and provide a wide range of useful utilities for working with numbers, strings, arrays, objects, and other data types. Here are a few examples of built-in JavaScript functions: These are just a few…

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In JavaScript, a function is a block of code that performs a specific task. Functions are an essential part of the language and are used to organize and structure your code. You can create your own functions in JavaScript and there are some built-in functions too. A JavaScript function has the following syntax: The function…

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