How to use Array some Method In Javascript
In this approach, we utilize the some method of arrays. We split the string into an array of characters and check if the character at the Kth index is a digit. The some method checks if any character at the Kth position is a digit using a helper function.
Example: This example shows the use of the above-explained approach.
// Function to check if Kth character is a digit using Array some method
function isKthCharDigit(str, k) {
const numStr = "0123456789".split('');
return numStr.some((digit) => digit === str.charAt(k));
}
// Test the function
const testStr = "geeks3geeks";
const k = 5;
console.log(`Is the ${k}th character a digit: ${isKthCharDigit(testStr, k)}`);
// Output
// Is the 5th character a digit: true
Output
Is the 5th character a digit: true
JavaScript Program to Test if Kth Character is Digit in String
Testing if the Kth character in a string is a digit in JavaScript involves checking the character at the specified index and determining if it is a numeric digit.
Examples:
Input : test_str = âgeeks9geeksâ, K = 5
Output : True
Explanation : 5th idx element is 9, a digit, hence True.
Input : test_str = âgeeks9geeksâ, K = 4
Output : False
Explanation : 4th idx element is s, not a digit, hence False.
These are the following approaches by using these we can check whether the digit is present at the Kth index or not:
Table of Content
- Using charAt():
- Using regular expression:
- Using loop
- Using codePointAt
- Using Character Comparison
- Using Array some Method