JavaScript Program to Check Whether the String is Symmetrical or Not

In this article, we will see how to check whether the given string is symmetric or not. The symmetrical string is one that is similar from the starting to mid and mid to end.

Example:

Input: khokho
Output: 
The entered string is symmetrical
Input: madam
Output: 
The entered string is not symmetrical
Input:amaama
Output:
The entered string is symmetrical

Methods to Check Whether the Given String is Symmetric or Not

• Naive Method
• Using string slice Method
• Using substring Method

Method 1: Naive method using loops

Example:

Javascript

let str = "abcdabc";
let mid = Math.ceil(str.length / 2);

for (let i = 0; i + mid < str.length; i++) {
    if (str[i] !== str[mid + i])
        return console.log("String is not Symmetric");
}

console.log("The Given string is symmetric");

Output

The Given string is symmetric

Method 2: Using the slice method

Example:

Javascript

let str = "abcdabc";
mid = Math.floor(str.length / 2);
if (
    str.slice(0, mid) ===
    str.slice(mid + (str.length % 2 === 0 ? 0 : 1))
)
    console.log("The given string is Symmetric");
else {
    console.log("The given string is Not Symmetric");
}

Output

The given string is Symmetric

Method 3: Using substring method

Javascript

let str = "abcdabc";
mid = Math.floor(str.length / 2);
if (
    str.substring(0, mid) ===
    str.substring(mid + (str.length % 2 === 0 ? 0 : 1))
)
    console.log("The given string is Symmetric");
else {
    console.log("The given string is Not Symmetric");
}

Output

The given string is Symmetric