Java Program to Find the Minimum Number in an Array

Find the minimum-tutorial

In Java, finding the minimum number in an array is a common operation in programming. This is useful for real-time applications such as tracking the lowest score, budget, temperature, etc.

Key Point

Start with assuming the first element is the minimum.

Traverse the array using a loop.

Compare each value and update if a smaller number is found.

Example: Find Minimum in Array

package com.quipohouse;

import java.util.Scanner;

public class Main {
    public static void main(String[ ] args) {

        System.out.println("Finding minimum number");

        Scanner input1 = new Scanner(System.in);
        System.out.println("Enter array size");
        int num1 = input1.nextInt();

        int[] arr = new int[10];
        System.out.println("Enter array values");
        for (int i = 0; i < num1; i++) {
            arr[i] = input1.nextInt();
        }

        int min = arr[0];  // Start with first element
        int ans = MinValue(arr, min, num1);

        System.out.println("Min value is = " + ans);
    }

    public static int MinValue(int[ ] arr, int min, int num1) {
        for (int j = 0; j < num1; j++) {
            if (arr[j] < min) {
                min = arr[j];
            }
        }
        return min;
    }
}

Output:

Finding minimum number
Enter array size
5
Enter array values
1
2
25
0
2
Min value is = 0

Explanation

Step	Description
arr[0]	First element is assumed to be the smallest
for loop	Traverses all array elements
if (arr[j] < min)	Compares and updates min if a smaller value exists
return min;	Returns the smallest number