javaS/controlFlow.js at main · sanojDD/javaS · 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
//if statement
// const temperature = 45;
// if (temperature === 50) {
//   console.log("lower than 50");
// } else {
//   console.log("temperature is greater");

// }
/*
const balance = 1000
// if (balance > 500) console.log("test"), console.log("test2");;//implicit scope

if (balance > 500 ) {
  console.log("greater than 500");
} else if( balance > 750 ){
console.log("greater than 750");
}
else{
  console.log("bhikari");
}
*/
/*
 // |switch| for number too
const month = "april";
 switch (month) {
  case "jan":
    console.log("january");
    break;
  case "feb":
    console.log("feb");
    break;
  case "march":
    console.log("march");
    break;
  case "april":
    console.log("april");
    break;

  default:
    console.log("you are not born");
    break;
 }
 */

//truthy and falsy value
const userEmail = "s@noj.com"//use here
if (userEmail) {
  // console.log("got user email");
} else {
  // console.log("no user email");
}

//falsy value
// false ,0, -0 ,bigInt, On ,"" ,null ,undefined ,NaN
//truthy value
//"0", "false" , " space " , "",{},[],function (){},
//example
//const userEmail = []
// if (userEmail.length === 0) {
//   console.log("empty array");
// }

// const emptyObj ={}
// if (Object.keys(emptyObj).length === 0) {
//   console.log("empty object");
// }

//nullish coslescing operator ??: null  and undefined

// let val1;
// val1 = null ?? 10;

// console.log(`${val1}`);

//ternary operator

const pizza = 100
// pizza >= 30 ? console.log("greater than 30") : console.log("less than 30");;