Assignment: Using Java: Increment each number in an array by 1

Java Programming Language Array in java (Article) Array in java (Program)

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Increment each number in an array by 1

You're given an array of integers.
Your task: Increment each number in the array by 1.

Parameters

numbers: An array of integers

Result

result: A new array of integers, where 1 has been added to each number in the original array

Constraints

  • The numbers array always contains at least one number.
  • Each integer can be either positive or negative.

Example 1:

Input: [1, 2, 3, 4, 5]
Result: [2, 3, 4, 5, 6]

Example 2:

Input: [-20, 30, -56]
Result: [-19, 31, -55]

Want a hint?

Learn about Java arrays.

Program:

class Answer {

    static boolean showExpectedResult = true;
    static boolean showHints = true;

    // Increment each number in the 'numbers' array by one
    static int[] incrementArray(int[] numbers) {
        for(int i = 0; i < numbers.length; i++){
            numbers[i] = numbers[i] + 1;
        }
        return numbers;
    }

    // Main method to test the function
    public static void main(String[] args) {
        int[] testArray1 = {1, 2, 3, 4, 5};
        int[] result1 = incrementArray(testArray1);
        System.out.println(java.util.Arrays.toString(result1)); // Expected: [2, 3, 4, 5, 6]

        int[] testArray2 = {-20, 30, -56};
        int[] result2 = incrementArray(testArray2);
        System.out.println(java.util.Arrays.toString(result2)); // Expected: [-19, 31, -55]
    }
}

Output:


                                        
Explanation:
Explanation of the Code:


    

  1. Loop through the Array: The for loop iterates over each index in the numbers array.
    2. 

  2. Incrementing: Inside the loop, numbers[i] = numbers[i] + 1 increases each element by 1.
    3. 

  3. Return the Modified Array: After the loop completes, the method returns the modified array numbers.
    4. 



Explanation of main Method:


    

  1. Test Cases: Two test cases are created to verify the function with different sets of values.
    2. 

  2. Print Results: java.util.Arrays.toString(result1) and java.util.Arrays.toString(result2) convert the array to a string format for easy printing.
    3. 



This approach makes it easy to verify that the incrementArray function works correctly.
                             
                              

                              
                              
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