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JavaScript Variable Scope

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SAMER SAEID answered on May 21, 2022 Popularity 10/10 Helpfulness 1/10

answer JavaScript Variable Scope

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JavaScript Variable Scope

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// program to print a text 
let a = "hello";

function greet () {
    console.log(a);
}

greet(); // hello

Popularity 10/10 Helpfulness 1/10 Language javascript

Source: Grepper

Tags: javascript scope

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Contributed on May 21 2022

SAMER SAEID

0 Answers Avg Quality 2/10

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javascript scope

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//there are three main types of scopes. Namely global scope, local scope and block scope
//In order to understand the concept lets consider the followin examples

//Global scope:
//Global Scopes variable can be accessed anywhere in the code
let globalVar = "Global variable. I can be accessed anywhere in the code"

//Local scope:
//It can only be accessed where it is defined
function localVar(){
	let local = "Local variable. I can be accessed only inside this function"
    console.log(local)
}
localVar()
//Block scope:
//It is used in conditional statements and loops, so thses are only accessed within that block
if(true){
	let blockVar = "Block variable. I can be accessed only within this block"
    console.log(blockVar);
}

//Now in order to test the above statements consider the following example.
//In the following example only the globalVar is will print the message
function testing(){
	console.log(globalVar)
    console.log(local)
    console.log(blockVar)
}
testing()

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: Grepper

Tags: javascript j

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Contributed on Jan 10 2024

Cyber-Ninja

0 Answers Avg Quality 2/10

javascript variable scope

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/*
In JavaScript, a variable has two types of scope:
1. Global Scope
2. Local Scope
*/

Popularity 10/10 Helpfulness 2/10 Language javascript

Source: www.programiz.com

Tags: javascript j

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Contributed on Jun 17 2022

Rasel Ahmed

0 Answers Avg Quality 2/10

js scope

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{   
    var variable_1 = "GFG";
    const variable_2 = "Geeksforgeeks";
    let x=2;
    x*=2;
    console.log(x);
    console.log(variable_2);
}

console.log(variable_2);

Popularity 6/10 Helpfulness 1/10 Language javascript

Source: www.geeksforgeeks.org

Tags: javascript scope

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Contributed on Sep 04 2024

Drab Donkey

0 Answers Avg Quality 2/10

JavaScript Variable Scope

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