Palindrome in JavaScript – GeeksforGeeks
We will understand how to check whether a given value is a palindrome or not in JavaScript. A palindrome is a value that reads the same from backward or forward. To perform this check we will use the following approaches:
Approach 1:
- Iterate over the string from forward and backward direction
- Check if the character match
- Return false for the first character that does not match
- Return true if all the comparisons are performed and the characters match
Example: This example implements the above approach.
Javascript
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Output:
true true false
Approach 2:
- Initialize a variable and store the reverse of the value in it using for loop
- Compare the original value with the reversed value
- If both values are equal return true else return false
Example: This example implements the above approach.
Javascript
|
Output:
true true false
Approach 3:
- Use inbuilt string methods like split() to split the string into characters array
- Reverse the array using reverse() method
- Join the array into a string using join() method
- Store this value inside another variable
- Compare the values and return true if both are equal
Example: This example implements the above approach on string
Javascript
|
Output:
true true false
Example: This example implements the above approach to Number
Javascript
|
Output: The Number is first converted to a string and then compared using the previous approach
true true false
To know more about How to check whether a passed string is palindrome or not in JavaScript?
We will understand how to check whether a given value is a palindrome or not in JavaScript. A palindrome is a value that reads the same from backward or forward. To perform this check we will use the following approaches:
Approach 1:
- Iterate over the string from forward and backward direction
- Check if the character match
- Return false for the first character that does not match
- Return true if all the comparisons are performed and the characters match
Example: This example implements the above approach.
Javascript
|
Output:
true true false
Approach 2:
- Initialize a variable and store the reverse of the value in it using for loop
- Compare the original value with the reversed value
- If both values are equal return true else return false
Example: This example implements the above approach.
Javascript
|
Output:
true true false
Approach 3:
- Use inbuilt string methods like split() to split the string into characters array
- Reverse the array using reverse() method
- Join the array into a string using join() method
- Store this value inside another variable
- Compare the values and return true if both are equal
Example: This example implements the above approach on string
Javascript
|
Output:
true true false
Example: This example implements the above approach to Number
Javascript
|
Output: The Number is first converted to a string and then compared using the previous approach
true true false
To know more about How to check whether a passed string is palindrome or not in JavaScript?