Concept explainers
(Count positive and negative numbers and compute the average of numbers) Write a
Enter an integer, the input ends if it is 0: 1 2 -1 3 0
The number of positives is 3
The number of negatives is 1
The total is 5.0
The average is 1.25
Enter an integer, the input ends if it is 0: 0
No numbers are entered except 0
Count positive and negative numbers and compute the average of numbers
Program Plan:
- Include the required import statement.
- Define the class
- Define the main() method using public static main.
- Declare and initialize the required variables.
- Declare the input scanner.
- Read an input from the user.
- Using while loop, check whether the integer is “0” or not
- Check whether the integer is greater than “0”.
- If so, increment the positive counter.
- Check whether the integer is less than “0”.
- If so, increment the negative counter.
- Calculate the sum of integers.
- Read the next input.
- Check whether the integer is greater than “0”.
- Display the sum and average of integers.
- Define the main() method using public static main.
The below program is used to count number of positives and number of negatives which are presented as inputs and finally calculate its sum and average as follows:
Explanation of Solution
Program:
//import statement
import java.util.Scanner;
//class Excersise_1
public class Excersise_1 {
// main function
public static void main(String[] args) {
// declare and initialize the required variables
int count_Positive = 0, count_Negative = 0;
int counter = 0, sum = 0, integer;
// declare the input scanner
Scanner in = new Scanner(System.in);
// print the instruction
System.out.print("Enter an integer, the input ends if it is 0: ");
// read the integer value from user
integer = in.nextInt();
// using while loop, check the integer
while (integer != 0) {
// check if it is positive
if (integer > 0)
/* if so, increment the positive counter */
count_Positive++;
// check if it is negative
else if (integer < 0)
/* if so, increment the negative counter */
count_Negative++;
// calculate the total of integer
sum += integer;
// increment the counter
counter++;
// Read the next integer
integer = in.nextInt();
}
// check the counter is 0
if (counter == 0)
// if so, no inputs are read
System.out.println("No numbers are entered except 0");
else {
// print the number of positive integers
System.out.println("The number of positives is " + count_Positive);
// print the number of negative integers
System.out.println("The number of negatives is " + count_Negative);
// print the sum
System.out.println("The total is " + sum);
// print the overall average
System.out.println("The average is " + sum * 1.0 / counter);
}
}
}
Enter an integer, the input ends if it is 0: 1
2
-1
3
0
The number of positives is 3
The number of negatives is 1
The total is 5
The average is 1.25
Want to see more full solutions like this?
Chapter 5 Solutions
Introduction to Java Programming and Data Structures, Comprehensive Version (11th Edition)
Additional Engineering Textbook Solutions
Starting Out with Python (4th Edition)
Starting Out with Java: Early Objects (6th Edition)
Starting Out with Java: From Control Structures through Data Structures (3rd Edition)
Starting Out with C++: Early Objects
Starting Out with Java: From Control Structures through Objects (7th Edition) (What's New in Computer Science)
Java How To Program (Early Objects)
- Compute the volume of a cylinder) Write a program that reads in the radius and length of a cylinder and computes the area and volume using the following formulas: area = radius * radius * p volume = area * lengtharrow_forwardA- write a program that multiply a number in Ax by 19B- write a program that divides the number in BL by the number in CL then multiplies the result by 2arrow_forward9- Write a program which read a number of 3 digits and check if (units, tens, hundreds) digit is greater than 5, convert this digit to 5. FOR eg. 147 After check 145 983 After check 553arrow_forward
- user_num = int(input('Enter integer:\n')) Extend the given program as indicated. Output the user's input. Output the input squared and cubed. Get a second user input into user_num2, and output the sum and product.arrow_forwardWrite a program to check if a number is a prime number. 1) let user input a number 2) check if its legal input (must be greater than 1), if not, ask the user input again until the input is greater than 1. 3) check if the number is prime 4) print "it is prime" or "it is composite". (A natural number (1, 2, 3, 4, 5, 6, etc.) is called a prime number (or a prime) if it is greater than 1 and cannot be written as the product of two smaller natural numbers) prime number only has divisors, 1 and itself.arrow_forwardPut code as well as code with outputarrow_forward
- (IN C LANGUAGE) Cumulative Addition: Computer selects a number between 7 and 23 at random. User will only add 2, 3 or 5 numbers to reach that number. For example: To reach 14:User will enter 5 5 2 2 (4 input).Also he can enter 2 2 2 2 2 2 2 (7 input) or 3 3 3 3 2 (5 input)arrow_forward(Find future dates) Write a program that prompts the user to enter an integer for today’s day of the week (Sunday is 0, Monday is 1, …, and Saturday is 6). Also prompt the user to enter the number of days after today for a future day and display the future day of the week.arrow_forwardM=5 N=2 P=M//N print("P") What is the output of the above programarrow_forward
- z=0 i=2 x=int(input("Enter any number") while i<=n: z=z+i/i+2 print(z) i=i+1 for the above program, Write down the question / series. (Write the series up to 3 times as written in the example below without space) example: z=1/2+2/3+3/4arrow_forwardQ1: (Palindrome number) Write a program that prompts the user to enter a three-digit integer and determines whether it is a palindrome number. A number is palindrome if it reads the same from right to left and from left to right. Here is a sample run of this program: Enter a three-digit integer: 121 121 is a palindrome Enter a three-digit integer: 123 123 not a palindromearrow_forward(Count positive and negative numbers and compute the average of numbers) Write a program that reads an unspecified number of integers, determines how many positive and negative values have been read, and computes the total and average of the input values (not counting zeros). Your program ends with the input 0. Display the average as a floating-point number. *********** USE PYTHON ********* Sample Run 1 Sample Output 1: Enter an integer, the input ends if it is 0: 1 Enter an integer, the input ends if it is 0: 2 Enter an integer, the input ends if it is 0: -1 Enter an integer, the input ends if it is 0: 3 Enter an integer, the input ends if it is 0: 0 The number of positives is 3 The number of negatives is 1 The total is 5 The average is 1.25 Sample Run 2 Sample Output 2: Enter an integer, the input ends if it is 0: 0 No numbers are entered except 0arrow_forward
- C++ Programming: From Problem Analysis to Program...Computer ScienceISBN:9781337102087Author:D. S. MalikPublisher:Cengage LearningC++ for Engineers and ScientistsComputer ScienceISBN:9781133187844Author:Bronson, Gary J.Publisher:Course Technology Ptr