## Introduction

Finding the largest number in an array is a common programming task, often used in data analysis and processing. This guide will show you how to create a Java program that identifies and displays the largest number in a given array.

## Problem Statement

Create a Java program that:

- Takes an array of integers as input.
- Finds and displays the largest number in the array.

### Example 1:

**Input**:`{3, 5, 7, 2, 8}`

**Output**:`The largest number is 8`

### Example 2:

**Input**:`{12, 45, 7, 89, 34}`

**Output**:`The largest number is 89`

## Solution Steps

**Initialize the Array**: Define an array with a set of integer values.**Initialize a Variable for the Largest Number**: Set a variable to hold the largest number, initialized to the smallest possible integer value.**Loop Through the Array**: Iterate through the array and compare each element to the current largest number.**Update the Largest Number**: If an element is greater than the current largest number, update the largest number.**Display the Largest Number**: Print the largest number found in the array.

## Java Program

### Approach: Using a `for`

Loop

```
import java.util.Scanner;
/**
* Java Program to Find the Largest Number in an Array using a for loop
* Author: https://www.javaguides.net/
*/
public class LargestNumberInArray {
public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
// Step 1: Initialize the array
System.out.print("Enter the number of elements in the array: ");
int n = scanner.nextInt();
int[] array = new int[n];
System.out.println("Enter the elements of the array:");
for (int i = 0; i < n; i++) {
array[i] = scanner.nextInt();
}
// Step 2: Initialize the largest number variable
int largest = array[0];
// Step 3: Loop through the array to find the largest number
for (int i = 1; i < array.length; i++) {
if (array[i] > largest) {
largest = array[i];
}
}
// Step 4: Display the largest number
System.out.println("The largest number is " + largest);
}
}
```

### Explanation

**Input**: The program prompts the user to enter the number of elements in the array and the elements themselves.**Finding the Largest Number**: The program initializes the`largest`

variable with the first element of the array. It then iterates through the array, comparing each element with the current`largest`

value. If a larger value is found, the`largest`

variable is updated.**Output**: The program prints the largest number found in the array.

### Output Example

```
Enter the number of elements in the array: 5
Enter the elements of the array:
3 5 7 2 8
The largest number is 8
```

## Conclusion

This Java program efficiently finds the largest number in an array by iterating through the array and updating a variable that holds the largest value found so far. This method is straightforward and works well for finding the maximum value in a list of numbers, making it a useful tool in various data processing tasks.

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