console-1690346930969.log

var arr = [10,20,30,40];
undefined
var arr2 = [100,200,300];
undefined
var arr3 = [arr, arr2];
undefined
arr3;
(2) [Array(4), Array(3)]0: (4) [10, 20, 30, 40]1: (3) [100, 200, 300]length: 2[[Prototype]]: Array(0)
arr3[0][0];
10
var arr4 = [...arr, ...arr2];
undefined
arr4;
(7) [10, 20, 30, 40, 100, 200, 300]
var emp = {id:1001, name:'Ram'};
undefined
var dept = {dname:'IT' , id:1002, };
undefined
var merge = {emp, dept};
undefined
merge.emp;
{id: 1001, name: 'Ram'}
merge.emp.name;
'Ram'
merge.dept.dname;
'IT'
var merge2 = {...emp, ...dept};
undefined
merge2;
{id: 1002, name: 'Ram', dname: 'IT'}
var x = [10,20,30];
undefined
var y = x;
undefined
y[0] = 1111;
1111
y;
(3) [1111, 20, 30]
x;
(3) [1111, 20, 30]
var z = [...x];
undefined
z;
(3) [1111, 20, 30]
x;
(3) [1111, 20, 30]
z[0] = 3333;
3333
z;
(3) [3333, 20, 30]
x;
(3) [1111, 20, 30]
function show(...arg){
    console.log(arg);
}
undefined
show(10,20,30,40);
VM994:2 (4) [10, 20, 30, 40]
undefined
show();
VM994:2 []
undefined
show(10,20);
VM994:2 (2) [10, 20]
undefined
var q =100;
undefined
var tt = 100; // Place at Top (Window)
function disp(){
    // var z1;
    console.log(z1); // undefined
    if(10>2){
        var z1 = 100;
    }
    console.log(z1); // 100
    var z1 =200;
    var z1 = 300;
    console.log(z1); // 300
}
undefined
show();
VM994:2 []
undefined
disp();
VM1364:4 undefined
VM1364:8 100
VM1364:11 300
undefined
tt;
100
z1;
VM1424:1 Uncaught ReferenceError: z1 is not defined
    at <anonymous>:1:1
(anonymous) @ VM1424:1
window.tt;
100
tt; // window.tt;
100
function output(){
    for(let i = 1; i<=5; i++){
        console.log(i);
    }
    console.log(i);
}
undefined
output();
VM1588:3 1
VM1588:3 2
VM1588:3 3
VM1588:3 4
VM1588:3 5
VM1588:5 Uncaught ReferenceError: i is not defined
    at output (<anonymous>:5:17)
    at <anonymous>:1:1
output @ VM1588:5
(anonymous) @ VM1608:1
function output(){
    for(let i = 1; i<=5; i++){
        console.log(i);
    }
    let i = 1000;
    console.log(i);
}
undefined
output();
VM1625:3 1
VM1625:3 2
VM1625:3 3
VM1625:3 4
VM1625:3 5
VM1625:6 1000
undefined
function output(){
    let i = 2000;
    for(let i = 1; i<=5; i++){
        console.log(i);
    }
    let i = 1000;
    console.log(i);
}
VM1665:6 Uncaught SyntaxError: Identifier 'i' has already been declared
function output(){
    console.log(i);
   let i =1000;
    console.log(i);
}
undefined
output();
VM1724:2 Uncaught ReferenceError: Cannot access 'i' before initialization
    at output (<anonymous>:2:17)
    at <anonymous>:1:1
output @ VM1724:2
(anonymous) @ VM1771:1
let p = 1000;
undefined
window.p;
undefined
function total(){
g = 1000;
}
undefined
total();
undefined
g;
1000
const MAX = 100;
undefined
MAX++;
VM2001:1 Uncaught TypeError: Assignment to constant variable.
    at <anonymous>:1:4
(anonymous) @ VM2001:1
MAX = 200;
VM2022:1 Uncaught TypeError: Assignment to constant variable.
    at <anonymous>:1:5
(anonymous) @ VM2022:1
const PRODUCTS = [10,20,30,40];
undefined
PRODUCTS.push(10000);
5
PRODUCTS;
(5) [10, 20, 30, 40, 10000]
PRODUCTS[0] = 3333;
3333
PRODUCTS;
(5) [3333, 20, 30, 40, 10000]
PRODUCTS = [1000,2000,300];
VM2311:1 Uncaught TypeError: Assignment to constant variable.
    at <anonymous>:1:10
(anonymous) @ VM2311:1