JavaScript/DatatypeConversion.js at main · MMH-org/JavaScript · GitHub

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
// let score =33;

// // const {score} =  req.body
// console.log(typeof score); // number
// console.log(typeof(score));  // number


let score ="Devil"// null , "1334asd" , true/false, undefine

// const {score} =  req.body // raw formet
// console.log(typeof score); // string
// console.log(typeof(score));// string

let valueInNumber= Number(score);
// console.log(typeof(valueInNumber));// string
// console.log(valueInNumber); // NaN

// "33" => 33
// "33abc" => NaN
// true => 1
// false => 0
// null => 0
// undefine => NAN

let isLoggedIn ="Devil";

let booleanInLoggedIn = Boolean(isLoggedIn);
// console.log(booleanInLoggedIn);

// 1 => true
// 2 => false
// "Devil" => true
// " " => false


let someNumber = 33
let stringNumber = String(someNumber);
// console.log(stringNumber);
// console.log(typeof(stringNumber));

// Operations🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️🏳️


let value = 3;
let negValue = -value;
// console.log(negValue);


// console.log(2+2);
// console.log(2-2);
// console.log(2*2);
// console.log(2**2);
// console.log(2/2);
// console.log(2%2);

let str1 = "hello"
let str2 = "devil"

let str3 =str1+str2;
// console.log(str3);

// console.log("1" +2);
// console.log(1 + "2");
// console.log("1" + 2 + 2);
// console.log(1 + "2" + 2);
// console.log(1 + 2 + "2");

// console.log(+true);
// console.log(true);
// console.log(+" ");

// let num1,num2,num3;
// num1=num2=num3=2 + 2;
// console.log(num1);
// console.log(num2);
// console.log(num3);

let gameCounter = 100;
gameCounter++;
// console.log(gameCounter);
++gameCounter;
// console.log(gameCounter);