console-1689928857254.log

var a;
undefined
a;
undefined
typeof a;
'undefined'
a=100;
100
typeof a;
'number'
a="Amit";
'Amit'
typeof a;
'string'
a=true;
true
typeof a;
'boolean'
a=1000000000000000;
1000000000000000
typeof a;
'number'
a=100.20;
100.2
typeof a;
'number'
a=1;
1
typeof a;
'number'
a=10;
10
a=a/0;
Infinity
a=10;

10
typeof a;
'number'
a=a/0;
Infinity
typeof a;
'number'
a;
Infinity
isFinite(a);
false
isFinite(a)?a:"Some Problem";
'Some Problem'
a=10;
10
a+ 20;
30
a+ "20";
'1020'
"Amit " +"Srivastava"
'Amit Srivastava'
"Amit " -"Srivastava"
NaN
100 + undefined;
NaN
typeof NaN;
'number'
a = 10 + undefined;
NaN
a;
NaN
typeof a;
'number'
isNaN(a)?0:a;
0
a=Number.MAX_SAFE_INTEGER;
9007199254740991
++a;
9007199254740992
++a;
9007199254740992
++a;
9007199254740992
++a;
9007199254740992
++a;
9007199254740992
a = 9007199254740992n;
9007199254740992n
typeof a;
'bigint'
a = a + 645654432342n;
9007844909173334n
a = BigInt("634634645765756756756765765");
634634645765756756756765765n
10000 + 7777n;
VM1244:1 Uncaught TypeError: Cannot mix BigInt and other types, use explicit conversions
    at <anonymous>:1:7
(anonymous) @ VM1244:1
a = "Amit";
'Amit'
typeof a;
'string'
a = 'Amit';
'Amit'
typeof a;
'string'
a='A';
'A'
typeof a;
'string'
a = "Let's Do It ";
"Let's Do It "
a = `hfdkjgdfkgkfdhkjgh
lkhfkghdkjhjk
hgjdfjkfhd`;
'hfdkjgdfkgkfdhkjgh\nlkhfkghdkjhjk\nhgjdfjkfhd'
a =10;
10
var b = 20;
undefined
"A is "+a+" and B is "+b;
'A is 10 and B is 20'
`A is ${a} and B is ${b}`; // String Interpolation ES6 (2015)
'A is 10 and B is 20'
var att = true;
undefined
typeof att;
'boolean'
10 + true;
11
qq = 10000;
10000
typeof qq;
'number'
function show(){
    var t=10;
    var t=20;
    var t = 30;
    gggg = 10000;
    console.log(t, gggg);
}
undefined
show();
VM2124:6 30 10000
undefined
t;
VM2155:1 Uncaught ReferenceError: t is not defined
    at <anonymous>:1:1
(anonymous) @ VM2155:1
gggg;
10000
gggg;
10000
window.gggg;
10000