JavaScript: Check whether a given integer is within 20 of 100 or 400
JavaScript Basic: Exercise-19 with Solution
Write a JavaScript program to check whether a given integer is within 20 of 100 or 400.
Sample Solution:
HTML Code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>JavaScript program to check whether a given integer is within 20 of 100 or 400.</title>
</head>
<body>
</body>
</html>
JavaScript Code:
function testhundred(x) {
return ((Math.abs(100 - x) <= 20) ||
(Math.abs(400 - x) <= 20));
}
console.log(testhundred(10));
console.log(testhundred(90));
console.log(testhundred(99));
console.log(testhundred(199));
console.log(testhundred(200));
Sample Output:
false true true false false
Flowchart:
ES6 Version:
function testhundred(x) {
return ((Math.abs(100 - x) <= 20) ||
(Math.abs(400 - x) <= 20));
}
console.log(testhundred(10));
console.log(testhundred(90));
console.log(testhundred(99));
console.log(testhundred(199));
console.log(testhundred(200));
Live Demo:
See the Pen JavaScript: Number in a range- basic-ex-19 by w3resource (@w3resource) on CodePen.
Improve this sample solution and post your code through Disqus
Previous: Write a JavaScript program to check two given numbers and return true if one of the number is 50 or if their sum is 50.
Next: Write a JavaScript program to check from two given integers, if one is positive and one is negative.
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JavaScript: Tips of the Day
How to insert an item into an array at a specific index (JavaScript)?
What you want is the splice function on the native array object.
arr.splice(index, 0, item); will insert item into arr at the specified index (deleting 0 items first, that is, it's just an insert). In this example we will create an array and add an element to it into index 2:
var arr = []; arr[0] = "Jani"; arr[1] = "Hege"; arr[2] = "Stale"; arr[3] = "Kai Jim"; arr[4] = "Borge"; console.log(arr.join()); arr.splice(2, 0, "Lene"); console.log(arr.join());
Ref: https://bit.ly/2BXbp04
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