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JavaScript: Test whether the character at the provided character index is upper case

JavaScript String: Exercise-43 with Solution

Write a JavaScript function to test whether the character at the index provided is upper case.

Test Data:
console.log(isUpperCaseAt('Js STRING EXERCISES', 1));
false

Pictorial Presentation:

JavaScript: Test whether the character at the provided character index is upper case

Sample Solution:-

HTML Code:

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JavaScript function to test whether the character at the provided index is upper case</title>
</head>
<body>

</body>
</html>

JavaScript Code:

function isUpperCaseAt(str, index) {
 return str.charAt(index).toUpperCase() === str.charAt(index);
    }
console.log(isUpperCaseAt('Js STRING EXERCISES', 1));

Sample Output:

false

Flowchart:

Flowchart: JavaScript: Test whether the character at the provided character index is upper case

Live Demo:

See the Pen JavaScript Test whether the character at the provided character index is upper case-string-ex-43 by w3resource (@w3resource) on CodePen.


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Previous: Write a JavaScript function to uncapitalize each word in the string.
Next: Write a JavaScript function to test whether the character at the provided character index is lower case.

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JavaScript: Tips of the Day

Backslashes

console.log(String.raw'Hello\nworld');

String.raw returns a string where the escapes (\n, \v, \t etc.) are ignored! Backslashes can be an issue since you could end up with something like:
const path = 'C:\Documents\Projects\table.html'
Which would result in:
"C:DocumentsProjects able.html"
With String.raw, it would simply ignore the escape and print:
C:\Documents\Projects\table.html
In this case, the string is Hello\nworld, which gets logged.

Ref: https://bit.ly/3jFRBje

 

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