JavaScript: Find the maximum integer n
JavaScript Basic: Exercise-145 with Solution
Write a JavaScript program to find the maximum integer n such that 1 + 2 + ... + n <= a given integer.
Sample Solution:
HTML Code:
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>Find the maximum integer n.</title>
</head>
<body>
</body>
</html>
JavaScript Code:
function sumn(val) {
var sn = 0;
var i = 0;
while (sn <= val) {
sn += i++;
}
return i - 2;
}
console.log(sumn(11))
console.log(sumn(15))
Sample Output:
4 5
Flowchart:

ES6 Version:
function sumn(val) {
let sn = 0;
let i = 0;
while (sn <= val) {
sn += i++;
}
return i - 2;
}
console.log(sumn(11))
console.log(sumn(15))
Live Demo:
See the Pen javascript-basic-exercise-145 by w3resource (@w3resource) on CodePen.
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Previous: Write a JavaScript program to sort the strings of a given array of strings in the order of increasing lengths.
Next: Write a JavaScript program to compute the sum of cubes of all integer from 1 to a given integer.
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JavaScript: Tips of the Day
Checks if a string is an anagram of another string (case-insensitive, ignores spaces, punctuation and special characters)
Example:
const isAnagram = (str1, str2) => { const normalize = str => str .toLowerCase() .replace(/[^a-z0-9]/gi, '') .split('') .sort() .join(''); return normalize(str1) === normalize(str2); }; console.log(isAnagram('iceman', 'cinema')); // true
Output:
true
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