When my program prints the sum values you enter, it doesnt include the first num

Question

When my program prints the sum values you enter, it doesnt include the first number in the series ..... how do i tell my program to include it ???

/**
* Assignment3
*
* @author Me
* @version 3.0
*/

import java.util.Scanner;

public class Assignment3
{
public static void main (String[]args)
{
Scanner Mescan = new Scanner(System.in);

int num = 0;
double sum = 0;
double last = 0;
double avg = 0;
double smallest = 0;
double largest = 0;

System.out.println("Please type in double values and to enter 0 when you are finished");
last = mescan.nextDouble();

if(last == 0)
{
System.out.println("You didn't type in anything");
}

while(last != 0)
{
sum = sum + last;
num++;
avg = sum / num;
System.out.println("Please type in a number ");
last = Mescan.nextDouble();

if(num == 1)
{
largest = last;
smallest = last;
}
if((last > largest)&&(last != 0))
{
largest = last;
}
if((last < smallest)&&(last != 0))
{
smallest = last;
}
if (last == 0)
{
System.out.println("The sum of your input is:" + sum);
System.out.println("The total number of inputs you provided was:" + num);
System.out.println("The average of your input is:" + avg);
System.out.println("The highest number of your input is:" + largest);
System.out.println("The smallest number of your input is:" + smallest);
}
}
Mescan.close();
}
}

Prints:

Type in double values and enter 0 when you are finished

-1

Type in another number

-2

Type in another number

-3

Type in another number

0

The sum of your input is:-6.0

The total number of inputs you provided was:3

The average of your input is:-2.0

The highest number of your input is:-2.0 ( this should say The highest number of your input is:-1.0) ...... Initial input value is not included

The smallest number of your input is:-3.0

Explanation / Answer

Hi,

I have fixed the issue and highlighted the code changes below.

Assignment3.java

import java.util.Scanner;

public class Assignment3
{
public static void main (String[]args)
{
Scanner Mescan = new Scanner(System.in);
int num = 0;
double sum = 0;
double last = 0;
double avg = 0;
double smallest = 0;
double largest = 0;
System.out.println("Please type in double values and to enter 0 when you are finished");
last = Mescan.nextDouble();
if(last == 0)
{
System.out.println("You didn't type in anything");
}
while(last != 0)
{
sum = sum + last;
num++;
avg = sum / num;
if(num == 1)
{
largest = last;
smallest = last;
}
if((last > largest)&&(last != 0))
{
largest = last;
}
if((last < smallest)&&(last != 0))
{
smallest = last;
}

System.out.println("Please type in a number ");
last = Mescan.nextDouble();

if (last == 0)
{
System.out.println("The sum of your input is:" + sum);
System.out.println("The total number of inputs you provided was:" + num);
System.out.println("The average of your input is:" + avg);
System.out.println("The highest number of your input is:" + largest);
System.out.println("The smallest number of your input is:" + smallest);
}
}
Mescan.close();
}
}

Output:

Please type in double values and to enter 0 when you are finished
-1
Please type in a number
-2
Please type in a number
-3
Please type in a number
0
The sum of your input is:-6.0
The total number of inputs you provided was:3
The average of your input is:-2.0
The highest number of your input is:-1.0
The smallest number of your input is:-3.0

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