Question

In java please

A boolean must be used for this problem!

Directions:

* Initialize a Boolean variable "first" to true.
* Repeat (another value has been read successfully)
*        If first is true
*            Set the minimum to the value.
*            Set first to false.
*        Else if the value is less than the minimum
*            Set the minimum to the value.
* Display the minimum.

So far I have:

import java.util.Scanner;
public class FindMinimumValue {

   public static void main(String[] args) {
       // initialize variables
       Scanner console=new Scanner(System.in);
       boolean first=true;
       int userNum=0, minValue=1, userNum2=0;
      
      
       //prompt
       System.out.println("Please enter two numbers. Enter 'y' when done.");
       userNum=console.nextInt();
       userNum2=console.nextInt();
      
      
       //calculate
       while (console.hasNextInt()) {
       if (first==true) {
           minValue=userNum;
           first=false;
       }
       else if (userNum<minValue){
           minValue=userNum;
       }
       }
      
      
       //display
       System.out.println("The minimum is: "+minValue);

   }

}

Can you please help because the output is just coming out to minValue=1 even though 'first'=true. I need the minimum input from the user and I have to use the boolean value in my program. Thank you

Answer 1

Program :

import java.util.Scanner;
public class FindMinimumValue {

public static void main(String[] args) {

// initialize variables
Scanner console=new Scanner(System.in);
boolean first=true;
int userNum=0, minValue=1,userNum2=0;
//prompt
System.out.println("Please enter two numbers. Enter 'y' when done.");
//userNum=console.nextInt();
//userNum2=console.nextInt();
// output is just coming out to minValue=1
//even though 'first'=true
//This is because, console.hasNextInt() gives false always
//in the previous case
//This program reads 2 integers
//first number is assigned to userNum
//2nd number is assigned to userNum2(previously)
//there is no 3rd number
//therefore we get false when we use console.hasNextInt()
//please check the output of this statement
//by uncommenting above two statements userNum= and userNum2=
//System.out.println(console.hasNextInt());
//calculate
//console.hasNextInt() check whether there is an integer or not
//on the modified case, there is two
//so this while loop execute 2 times
//And we will get correct output
while (console.hasNextInt()) {

//assigns each number entered one by one
userNum=console.nextInt();
if (first==true) {

minValue=userNum;
first=false;

}
else if (userNum<minValue){

minValue=userNum;

}

}
//display
System.out.println("The minimum is: "+minValue);

}

}

Output :