Primitive Operators

Question

I am so confused with this one, I dont know where am I wrong. My code:

import java.util.Scanner;

public class Main {

public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
double pi = 3.14;
//your code goes here
int var;
var = scanner.nextInt(4);
double result = 2* pi * var;
System.out.println("double result");

}
}

Answer 1

var = scanner.nextInt(4);//take off the # 4

Answer 2

import java.util.Scanner;

public class Main {

public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
double pi = 3.14;
//your code goes here
int var;
var = scanner.nextInt();
double result = 2 * pi * var;
System.out.println(result);

}
}

bro you should remove 4 from the scanner code line
var = scanner.nextInt(4);

should be replaced by
var = scanner.nextInt();

Answer 3

you were so close. So I think you can do it like this.

double pi = 3.14 * 2;
int n = scanner.nextInt();
double result = pi * n ;
System.out.println(result);// here do it without quote, because the result is name of the variable.

Answer 4

oh, okay okay, thank you guys :) Im pretty newbie with this (my second day trying to learn by myself so, im pretty lost haha.

Answer 5

It doesnt works for me,

int n = scanner.nextlnt(4);
double result = pi * n;
System.out.println(result);

The error I get:

/usercode/Main.java:9: error: cannot find symbol
int n = scanner.nextlnt(4);
^
symbol: method nextlnt(int)
location: variable scanner of type Scanner
1 error

Answer 6

I dont think the error comes from that linea, the error that I get is:

/usercode/Main.java:12: error: '.class' expected
System.out.println(double result);
^
/usercode/Main.java:12: error: ';' expected
System.out.println(double result);

And the code that Im using atm:

int var;
var = scanner.nextInt(4);
double result = 2* pi * var;
System.out.println(double result);

Answer 7

oh! Okay thank you both, it worked, but I dont understand why it worked? Im pretty dumb still, can I ask you, why shouldnt I put the 4? I mean, shouldnt I give the information that the Var is 4?

Answer 8

import java.util.Scanner;

public class Main {

public static void main(String[] args) {
Scanner scanner = new Scanner(System.in);
double pi = 3.14;
//your code goes here
int radius = 2;
System.out.println(radius*pi*scanner.nextInt());

}
}