JavaScript: Excel column title related with a column number

Last update on December 17 2022 12:21:06 (UTC/GMT +8 hours)

JavaScript Math: Exercise-97 with Solution

Write a JavaScript program to retrieve the Excel column title associated with a given column number (integer value).

For example:
1 -> A
2 -> B
3 -> C
...
26 -> Z
27 -> AA
28 -> AB
...

Visualisation:

$JavaScript Math: Excel column title related with a column number.$

Test Data:
(3) -> C
(27) -> AA
( 151) -> EU

Sample Solution-1:

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript program to Excel column title related with a column number</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function test(n) {
  s = 1;
  e = 26;
  result = "";
  while ((n -= s) >= 0) {
        result = String.fromCharCode(parseInt((n % e) / s) + 65) + result;
        s = e;
        e *= 26;
    }
  return result;
}
n = 4
console.log("n = " + n)
console.log("Excel column title related with the said column number: "+test(n));
n = 27
console.log("n = " + n)
console.log("Excel column title related with the said column number: "+test(n));
n = 151
console.log("n = " + n)
console.log("Excel column title related with the said column number: "+test(n));

Sample Output:

n = 4
Excel column title related with the said column number: D
n = 27
Excel column title related with the said column number: AA
n = 151
Excel column title related with the said column number: EU

Flowchart:

$JavaScript: Number of trailing zeroes in a factorial.$

Live Demo:

See the Pen javascript-math-exercise-97 by w3resource (@w3resource) on CodePen.

Sample Solution-2:

JavaScript Code:

function test(n) {
    result = '';
    while(n > 0){
        el = String.fromCharCode(65 + (n-1) % 26);
        result = el + result;
        n = ~~((n-1)/26);
    }
    return result;
}
n = 4
console.log("n = " + n)
console.log("Excel column title related with the said column number: "+test(n));
n = 27
console.log("n = " + n)
console.log("Excel column title related with the said column number: "+test(n));
n = 151
console.log("n = " + n)
console.log("Excel column title related with the said column number: "+test(n));

Sample Output:

n = 4
Excel column title related with the said column number: D
n = 27
Excel column title related with the said column number: AA
n = 151
Excel column title related with the said column number: EU

Flowchart:

$JavaScript: Excel column title related with a column number.$

Live Demo:

See the Pen javascript-math-exercise-97-1 by w3resource (@w3resource) on CodePen.

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