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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:

Flowchart: JavaScript - Check a given integer is within 20 of 100 or 400

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.


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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

Returns the sum of the powers of all the numbers from start to end (both inclusive)

Example:

const sumPower = (end, power = 2, start = 1) =>
  Array(end + 1 - start)
    .fill(0)
    .map((x, i) => (i + start) ** power)
    .reduce((a, b) => a + b, 0);
console.log(sumPower(10)); // 385
console.log(sumPower(10, 3)); // 3025
console.log(sumPower(10, 3, 5)); // 2925 

Output:

385
3025
2925