# 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>
<meta charset="utf-8">
<meta name="viewport" content="width=device-width">
<title>Find the maximum integer n.</title>
<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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## 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
```