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showing results for - "js or operator"
Lara
25 Feb 2020
1Javascript Comparison Operators
2== Equal to
3=== Equal value and equal type
4!= Not equal
5!== Not equal value or not equal type
6> Greater than
7< Less than
8>= Greater than or equal to
9<= Less than or equal to
10? Ternary operator
11
Karim
26 Apr 2018
1if(a <= 5){
2   yourFunction();
3}
Chris
05 May 2017
1var a = 2;
2var b = 5;
3var c = 10;
4
5if (a === 3 || a === 2) {
6	console.log("TRUE");
7} else {console.log("FALSE");}
8if (a === 4 || b === 3 || c === 11) {
9	console.log("TRUE");
10} else {console.log("FALSE");}
11if (b === 5 || c != 10) {
12	console.log("TRUE");
13} else {console.log("FALSE");}
14
15/* Output:
16TRUE
17FALSE
18TRUE
19*/
Isabell
01 May 2017
1//|| is the or operator in JavaScript
2if(a == 1 || b != 'value'){
3    yourFunction();
4}
Alina
06 Jan 2018
1/*OR operator:*/
2||
3
4// example:
5var a = 10;
6var b = 5;
7
8if(a > 7 or b > 7){ 
9  print("This will print!")
10}
11// Even though a is not less than 7, b is, so the program will print
12// the statement.
Giuseppe
29 Sep 2017
1// index.html
2<!DOCTYPE html>
3<html lang="en">
4  <head>
5    <meta charset="UTF-8" />
6    <meta http-equiv="X-UA-Compatible" content="IE=edge" />
7    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
8    <title>js or operator</title>
9  </head>
10  <body>
11    <h1 class="display_msg">Add</h1>
12    <input type="text" name="num1" id="num1" /><br />
13    <input type="text" name="num2" id="num2" /><br /><br />
14    <button type="button" onclick="btnClicked()">Add</button>
15    <br /><br />
16    <span class="valid_details"></span>
17    <script src="app.js"></script>
18  </body>
19</html>
20
21// app.js
22function btnClicked() {
23  // value 1 and 2 from html input fields (with id 'num1' and 'num2')
24  // you can also use document.querySelector
25  let num1 = document.getElementById("num1").value;
26  let num2 = document.getElementById("num2").value;
27
28  // simple addition of num1 and 2 stored in 'result'
29  // use innerHTML to display the results in the browser
30  let result = (document.querySelector(".display_msg").innerHTML =
31    Number(num1) + Number(num2));
32
33  // some sort of validation using 'or' '||'
34  if (
35    num1 === "" ||
36    num2 === "" ||
37    num1 === 0 ||
38    num1 === "0" ||
39    num2 === 0 ||
40    num2 === "0"
41  ) {
42    result = document.querySelector(
43      ".display_msg"
44    ).innerHTML = `Invalid Input!!!`;
45    return result;
46  } else {
47    return result;
48  }
49
50  /*
51   *  this will not print because return statement will basically end the function
52   *  https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Statements/return
53   */
54
55  console.log(result);
56}
57
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