in-class Java exercise 1

Ctrl+Speak · Explain Your Code

Interview-style speaking practice (simple Java)

Exercise · Explain This Java Method (Sum of Numbers)

Java · Beginner

Explain this code out loud as if you are in a job interview. Focus on what it does, how the loop works, and what is returned.

public class Calculator {

  public static int sumArray(int[] numbers) {
    int total = 0;

    for (int i = 0; i < numbers.length; i++) {
      total = total + numbers[i];
    }

    return total;
  }
}

🎯 Instructions oral task

Say the purpose of the method in one sentence.
Explain what the input parameter is.
Explain what total is used for.
Describe what happens inside the for loop.
Explain what value is returned.

📖 Vocabulary core words

method — a block of code that performs a task.
parameter — a value passed into a method.
array — a list of values of the same type.
loop — code that repeats.
accumulator — a variable used to keep a running total.
return — send a value back from a method.

🧩 Collocations natural English

initialize a variable
loop through an array
add each value
store the result
return the final total

🗣️ Phrasal Verbs interview speech

go through — “The loop goes through each number.”
add up — “The method adds up all the values.”
end up — “We end up with the total sum.”
set up — “We set up a variable called total.”

🎤 Model Answer spoken

This method calculates the sum of all numbers in an integer array. It takes an array called numbers as input and returns a single integer.

First, it initializes a variable called total and sets it to zero. Then, the for loop goes through the array one element at a time. During each iteration, the current number is added to total.

After the loop finishes, the method returns the final value of total, which represents the sum of all elements in the array.