An array is considered as a container to store all the elements of the same data type. Your integer array’s values can be only integer type. An array including only character values will be called a char array.

Our following tutorial will offer some methods to convert a char character to int in Javascript with detailed explanations and examples.

How To Convert A Char Array To Int In Javascript

All the following methods will be built-in functions in Javascript, which are easy to follow and accomplish the task in no time.

Method 1: Use The parseInt() Method

Using the parseInt() option is one of the most commonly used approaches to convert a char array into int. It works by taking a string object and returning a specific integer value.

The method originates from the integer class, which is ideal for integer conversion.

Code:

public class SimpleTesting{
    public static void main(String[] args) {
        char[] arr = {'2','3','4','5'};
        int val = contains(arr);
        System.out.println("Int value after conversion : "+val);
    }

    public static int contains(final char[] arr) {
        int number = Integer.parseInt(new String(arr));
        return number; 
    }
}

Output:

Int value after conversion : 2345

Method 2: Use The parseInt() Method

The parseInt() function can be combined with the valueOf() to convert your char array into integer in Javascript. In the first step, it will take a string object and receive the result from the valueOf() function.

You should get an integer value after this step. Once again, as it belongs to the Integer class, it can  easily convert any array into an integer.

Code:

public class SimpleTesting{
    public static void main(String[] args) {
        char[] arr = {'2','3','4','5'};
        int val = contains(arr);
        System.out.println("Int value after conversion : "+val);
    }

    public static int contains(final char[] arr) {
        int number = Integer.parseInt(String.valueOf(arr));
        return number; 
    }
}

Output:

Int value after conversion : 2345

Method 3: Use The Customized Code

If your operating system doesn’t support these two functions mentioned above, you can get the converting task done with a customized method.

Here, the contains() function is highly recommended. It will take your array as an argument and return an integer value.

Code:

public class SimpleTesting{
      public static void main(String[] args) {
            char[] arr = {'2','3','4','5'};
            int val = contains(arr);
            System.out.println("Int value after conversion : "+val);
      }

      public static int contains(final char[] arr) {
            int result = 0;
            int length = arr.length - 1;

            for (int i = 0; i <= length; i++)
            {
                  int digit = arr[i] - '0';
                  result *= 10;
                  result += digit;
            }

            return result;
      }
}

Differences Between A Char Array And An Integer Array

Undoubtedly, an array is a basic structure where at least one element of the same data type exists. An int array will include all the elements of the integer type. There will be no fractional component in this one.

On the other hand, the character array boasts nothing but the characters. Thus, the main difference between these two types of array is the value they include.

A floating point array will be the one having elements of both two types mentioned above.

Conclusion

Sometimes, you will need to convert a char array in int in Javascript for simpler data analysis and program processing. The tutorial has suggested three main methods to deal with the problem. Check it again and choose a wise approach.