Java program to find largest and smallest number in an array

In this tutorial, we will discuss the concept of a Java program to find the largest and smallest number in an array

In this topic, we learn how to find the smallest and largest element of an array(Collection of elements)

This program gets “n” number of elements and Enter the elements of the array as input from the user. then, this program finds and displays the smallest and largest elements from the array using for loops.

Java program to find largest and smallest number in an array — find largest and smallest number in an array

In this programs, we can see step by step procedure for completion of the program.

array declaration
Essential variable declaration
Get input from the user for array length
Get input from the user for array elements
loop for find the smallest and largest value
Display result on the screen

Find the Largest and Smallest value – integer Array

Program 1

import java.util.Scanner;
class Large_Small_num1{
public static void main (String args[]){
Scanner scan=new Scanner(System.in);
System.out.print("Enter the number of elements in an array: ");
int min,max;
int n=scan.nextInt();//get input from user for array length
int arr[]=new int[n]; //declaring an array of n elements

//for loop takes input from user
for(int i=0; i<n; i++){
   System.out.print("Enter the element "+(i+1)+": ");
   arr[i]=scan.nextInt();//takes input from user for array
   }
   min=arr[0];//assume first element as smallest value
   max=arr[0];//assume first element as largest value
   for(int i=0; i<n; i++){
     if(min>arr[i]){//loop for find minimum elements
       min=arr[i];
     }
     
     if(max<arr[i]){
       max=arr[i];  //loop for find maximum elements
     }
   }
   System.out.print("\nThe smallest value is: "+min);
   System.out.print("\nThe largest value is: "+max);
}//display result on the result
}

When the above code is compiled and executed, it produces the following results

Enter the number of elements in an array: 5
Enter the elements 1: 45
Enter the elements 2: 96
Enter the elements 3: 12
Enter the elements 4: 34
Enter the elements 5: 65

The smallest value is:12
The largest value is:96

Find the Largest and Smallest value – float Array

Program 2

import java.util.Scanner;
class Large_Small_num{
public static void main (String args[]){
Scanner scan=new Scanner(System.in);
System.out.print("Enter the number of elements in an array: ");
float min,max;
int n=scan.nextInt();//get input from user for array length
float arr[]=new float[n]; //declaring an array of n elements

//for loop takes input from user
for(int i=0; i<n; i++){
   System.out.print("Enter the element "+(i+1)+": ");
   arr[i]=scan.nextFloat();//takes input from user for array
   }
   min=arr[0];//assume first element as smallest value
   max=arr[0];//assume first element as largest value
   for(int i=0; i<n; i++){
     if(min>arr[i]){//loop for find minimun elements
       min=arr[i];
     }
     
     if(max<arr[i]){
       max=arr[i];  //loop for find maximun elements
     }
   }
   System.out.print("\nThe smallest value is: "+min);
   System.out.print("\nThe largest value is: "+max);
}//display result on the result
}

When the above code is compiled and executed, it produces the following results

Enter the number of elements in an array:5
Enter the element 1: 8.9
Enter the element 2: 5.2
Enter the element 3: 2.1
Enter the element 4: 5.6
Enter the element 5: 4.3

The smallest value is: 2.1
The largest value is:8.9

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