To develop a method that retrieves the greatest value in an array, you must first understand how to create a method. If you don't know how to create a method, I recommend reading my article on Java methods.

 

Below are the steps to retrieves the greatest value in an array

Step 1

1.create a method name with an argument of an array e.g

public static int Highest(int[] array) {}

 

2.Inside your method initialize variable depending on your array type or method return type ( it advisable to use your method return type), make it equals to the argument of your method with an index of 0 e.g

public static int Highest(int[] array) {
        int high = array[0];
}

 

3.Loop through your array and compare each value to your variable you initialized earlier e.g

public static int Highest(int[] array) {
        int high = array[0];
        for (int i = 0; i < array.length; i++) {
           if(array[i] > high){
              high = array[i];
           }
        }
    return high;
    }

 

Almost the same thing for finding lowest , the only difference is in the for loop like so

 

 for (int i = 0; i < array.length; i++) {
           if(array[i] < low){
              low = array[i];
           }
//you can choose  to change the varible name to low if u want 

 

Lets test our our method

test Example with highest ;

public class Highset {
    public static void main(String[] args) {
        int[] num = {1, 3, 5, 7, 10, 11, 15, 2, 1};
        int highest = Highest(num);
        System.out.println(highest);
    }
    public static int Highest(int[] array) {
        int high = array[0];
        for (int i = 0; i < array.length; i++) {
           if(array[i] > high){
              high = array[i];
           }
        }
    return high;
    }
}

//output:15

 

test Example with lowest ;

public class Highset {
    public static void main(String[] args) {
        int[] num = {1, 3, 5, 7, 10, 11, 15, 2, 1};
        int lowest = Lowest(num);
        System.out.println(highest);
    }
    public static int Lowest(int[] array) {
        int low = array[0];
         for (int i = 0; i < array.length; i++) {
           if(array[i] < low){
              low = array[i];
           }
        }
    return low;
    }
}

//output:1