minimum value in java won't work

Question

I need help because my brain cells cannot find what is wrong with this program! Here\'s the code

     import java.util.*;
      public class student{
      publ         


        

Answer 1

int []myArray= new int[num];

int array default elements to 0

Answer 2

You initialize you array. And then default values are given (every int is initialized 0)

   int []myArray= new int[num];
   int minValue=myArray[0];

it will be 0

so nothing smaller can be found than zero if you type in positive integers

Solution First fill your array with the user input THEN do

 int minValue=myArray[0];

Or use Integer.MIN_VALUE.

Answer 3

When you go through to look for either the minimum or maximum of a set of values, it's better to assume that all values will be larger than a default maximum value (i.e. set your maximum value to the smallest possible integer), and that all values will be smaller than a default minimum value (i.e. set your minimum value to be the largest possible integer).

The above sounds counterintuitive, but as you iterate through the array, if you come across a value that is "larger" than the maximum, you update your max value. The same idea applies for the minimum (i.e. if you find a value smaller than your minimum). Since both would start out at their logical extremes, you'll be able to find the true minimum/maximum easier.

The code

int maxValue=myArray[0];
int minValue=myArray[0];

implies that both maxValue and minValue are 0, since a primitive integer array will always populate itself with zeroes. Instead, you should try this:

int maxValue=Integer.MIN_VALUE;
int minValue=Integer.MAX_VALUE;

For some clarification on those Integer constants, check out Integer.MAX_VALUE and Integer.MIN_VALUE in the API.

Answer 4

int minValue=myArray[0]; 

because of this line, your minValue is set to 0. So the minimum value would be reset in this method only if the myArray[i] in the below code is less than 0. Otherwise it remains 0.

 for( i=1; i<myArray.length-1;i++) 
        { 
           if( myArray[i]<minValue) 
            {
              minValue= myArray[i];                

            } 
        }