Thread: Help me check my assignment if it is correct.

Hi my professor wants me to make a program this this set of guidline.

You are required to write a command line program in Java that takes in 5 integer
numbers from a user. You must store the numbers in an array. Use an appropriate loop
to loop through the array and check each value. If any of the numbers in the array is less than 4, print out to the screen

“The number” [number] “is less than 4!”

i don't know if my code is correct and have any errors, please if you see any, try to tell me what it is and how to fix it. if it is good to go, please tell me also.

import java.util.scanner;

public class assignmentA
{
	public static void main(String[] args){
 
	int[] newArray=new int[5];
 
 
	while(newArray < 4){
 
		System.out.println("Please Enter 1st number: ");
 
		Scanner scan = new Scanner(System.in);
 
		newArray[0] = scan.nextInt();
 
		System.out.println("Please Enter 2nd number: ");	
 
		newArray[[1] = scan.nextInt();
 
		System.out.println("Please Enter 3rd number: ");
 
		newArray[2] = scan.nextInt();
 
		System.out.println("Please Enter 4th number: ");
 
		newArray[3] = scan.nextInt();
 
		System.out.println("Please Enter 1st number: ");
 
		newArray[4] = scan.nextInt();
 
		if(newArray < 4){
 
		System.out.println("The number "+ newArray +" is less than 4!");
		}
 
		}
	}
}

i compiled it in an online compile called Codepad and the error only says

error: 'import' does not name a type

Originally Posted by mamaass

ok i have checked again and the errors says.

Main.java:3: class assignmentA is public, should be declared in a file named assignmentA.java
public class assignmentA
^
Main.java:10: operator < cannot be applied to int[],int
while(newArray < 4){
^
Main.java:34: operator < cannot be applied to int[],int
if(newArray < 4){
^
3 errors

technically, i only have 2 errors since the 1st is easy to fix. anyone knows how to fix the remaining two?

How are you planning on fixing the first error? Again, keep in mind that Java is case sensitive, and the standard naming conventions mean that class names should start with a capital letter.

yes. i will be changing that in a bit. the name of the file should be the same with the class name.

For your other error, the compiler is saying that it can't use the < operator on an array. That makes sense, as what would it mean for an array to be less than another array?

do you know how to fix that one? it says i need to make the the number that user inputted so as it must not be less than 4.

im trying to to check all the elements that the users will be inputting if it is less than 4. if it is then it must show this:

System.out.println("The number "+ newArray +" is less than 4!");

reading it now. in this case, what would you use? while loop or if-else statement?

i tried the if statement.

import java.util.scanner;
 
public class assignmentA
{
        public static void main(String[] args){
 
        int[] newArray=new int[5];
 
 
 
                System.out.println("Please Enter 1st number: ");
 
                Scanner scan = new Scanner(System.in);
 
                newArray[0] = scan.nextInt();
 
                System.out.println("Please Enter 2nd number: ");        
 
                newArray[1] = scan.nextInt();
 
                System.out.println("Please Enter 3rd number: ");
 
                newArray[2] = scan.nextInt();
 
                System.out.println("Please Enter 4th number: ");
 
                newArray[3] = scan.nextInt();
 
                System.out.println("Please Enter 1st number: ");
 
                newArray[4] = scan.nextInt();
 
                if(newArray[0],newArray[1],newArray[2],newArray[3],newArray[4] < 4){
 
                System.out.println("The number "+ newArray +" is less than 4!");
                }
 
                }
        }
}

when i compiled it, it had many errors than the while loop.

Main.java:33: ')' expected
if(newArray[0],newArray[1],newArray[2],newArray[3],newArray[4] < 4){
^
Main.java:33: ';' expected
if(newArray[0],newArray[1],newArray[2],newArray[3],newArray[4] < 4){
^
Main.java:33: illegal start of expression
if(newArray[0],newArray[1],newArray[2],newArray[3],newArray[4] < 4){
^
Main.java:33: ';' expected
if(newArray[0],newArray[1],newArray[2],newArray[3],newArray[4] < 4){
^
Main.java:33: illegal start of expression
if(newArray[0],newArray[1],newArray[2],newArray[3],newArray[4] < 4){
^
Main.java:33: ';' expected
if(newArray[0],newArray[1],newArray[2],newArray[3],newArray[4] < 4){
^
Main.java:33: not a statement
if(newArray[0],newArray[1],newArray[2],newArray[3],newArray[4] < 4){
^
Main.java:33: ';' expected
if(newArray[0],newArray[1],newArray[2],newArray[3],newArray[4] < 4){
^
Main.java:33: not a statement
if(newArray[0],newArray[1],newArray[2],newArray[3],newArray[4] < 4){
^
Main.java:33: ';' expected
if(newArray[0],newArray[1],newArray[2],newArray[3],newArray[4] < 4){
^
Main.java:33: not a statement
if(newArray[0],newArray[1],newArray[2],newArray[3],newArray[4] < 4){
^
Main.java:33: ';' expected
if(newArray[0],newArray[1],newArray[2],newArray[3],newArray[4] < 4){
^
Main.java:40: class, interface, or enum expected
}
^
13 errors

how can i use an array in an if statements then? kinda confused when i put them together. its not state in the toturials.

ok i changed some of the parts to

import java.util.scanner;
 
public class assignmentA
{
	public static void main(String[] args){
 
	int[] newArray=new int[5];
 
 
 
		System.out.println("Please Enter 1st number: ");
 
		Scanner scan = new Scanner(System.in);
 
		newArray[0] = scan.nextInt();
 
		System.out.println("Please Enter 2nd number: ");	
 
		newArray[1] = scan.nextInt();
 
		System.out.println("Please Enter 3rd number: ");
 
		newArray[2] = scan.nextInt();
 
		System.out.println("Please Enter 4th number: ");
 
		newArray[3] = scan.nextInt();
 
		System.out.println("Please Enter 1st number: ");
 
		newArray[4] = scan.nextInt();
 
		if(newArray < 4){
 
		System.out.println("The number "+ newArray +" is less than 4!");
		}
 
 
	}
}

and there is only 1 error left.

Main.java:33: operator < cannot be applied to int[],int
if(newArray < 4){

Originally Posted by KevinWorkman

That's going back to your original error. It doesn't make sense to use the < operator on an entire array.

what will i do so that it will check the element that the user's input and make sure it's not less than 4?

i made some changes on this one and has no errors on it.

import java.util.Scanner;
 
public class assignmentA
{
	public static void main(String[] args){
 
	int[] newArray;
	newArray= new int[5];
 
 
		System.out.println("Please Enter 1st number: ");
 
		Scanner scan = new Scanner(System.in);
 
		newArray[0] = scan.nextInt();
 
		System.out.println("Please Enter 2nd number: ");	
 
		newArray[1] = scan.nextInt();
 
		System.out.println("Please Enter 3rd number: ");
 
		newArray[2] = scan.nextInt();
 
		System.out.println("Please Enter 4th number: ");
 
		newArray[3] = scan.nextInt();
 
		System.out.println("Please Enter 5th number: ");
 
		newArray[4] = scan.nextInt();
 
		for (int num : newArray) {
 
		if (num < 4) 
 
			System.out.println("The number "+ num +" is less than 4!");
		}
 
 
	}
}

u lock
import java.util.Scanner;