[FIXED] count negative and positive integer with while loop

Issue

Need to fix my program. Write a java program using WHILE LOOP: how many positive and negative numbers? User prompt the integers and ends with number 0. You will see in my output that if user enter 1 2 3 -1 -2 -3 0 My output answer: 2 positive / 3 negative. The first positive number is not count. Please let me know where is my error. I cannot find it.

    Scanner input= new Scanner(System.in);
    
    //int data;
    int count = 0;
    int negative=0;
    int positive =0;
    
    System.out.print("Enter an integer (Program ends if enter 0): ");
    int data = input.nextInt();
    
    
    
    while (data !=0) {
    
    System.out.print("Enter an integer (Program ends if enter 0): ");
    data=input.nextInt();
    //count++;
    if (data < 0){
    negative++;
    }else if (data > 0){
    positive++;
    }
    count++;
  }
    System.out.println(positive + " positive numbers");
    System.out.println(negative + " negative numbers");
    
 }
}

output:
run:
Enter an integer (Program ends if enter 0): 1
Enter an integer (Program ends if enter 0): 2
Enter an integer (Program ends if enter 0): 3
Enter an integer (Program ends if enter 0): -1
Enter an integer (Program ends if enter 0): -2
Enter an integer (Program ends if enter 0): -3
Enter an integer (Program ends if enter 0): 0
2 positive numbers
3 negative numbers
BUILD SUCCESSFUL (total time: 11 seconds)

Solution

You are over riding the first input, after entering into the loop.

1. You are reading the input and checking if input is not equal to zero or not
2. After entering into the loop again you are reading the input from scanner and storing it to variable data(here the previous data is getting overridden)

updated Code:

Scanner input = new Scanner(System.in);

// int data;
int count = 0;
int negative = 0;
int positive = 0;

System.out.print("Enter an integer (Program ends if enter 0): ");
int data = input.nextInt();

while (data != 0) {
    // count++;
    if (data < 0) {
        negative++;
    } else if (data > 0) {
        positive++;
    }
    count++;
    
    System.out.print("Enter an integer (Program ends if enter 0): ");
    data = input.nextInt();
}
System.out.println(positive + " positive numbers");
System.out.println(negative + " negative numbers");

Answered By - Manjunath H M
Answer Checked By - Katrina (JavaFixing Volunteer)