What does a “Cannot find symbol” compilation error mean here?

Question

import java.io.*;

import java.util.*;
import java.text.*;
import java.math.*;
import java.util.regex.*;
import java.lang.*;

public class Solution {

    public static void main(String[] args) {
        Scanner sc=new Scanner(System.in);
        int a=sc.nextInt();
        int b=sc.nextInt();
        int n=sc.nextInt();
  for ( n=1 ; n<11; n++){
        int z = a + b(Math.pow(2,n+1) - 1) ;
      System.out.println(z);
     }
   } 
 }

and the error says like this Compile time error Compile Message Solution.java:18: error: cannot find symbol

int z = a + (b) (Math.pow(2,n+1) - 1) ;
                    ^
  symbol:   class b
  location: class Solution
1 error

Java doesn't work with operation like this 2(3-1), it needs 2*(3-1). In your case b*(Math.pow(2,n+1) -1) — ganchito55, May 14 '16 at 14:22

score 3 · Accepted Answer · edited May 23 '17 at 12:31

3

Are you trying to multiply the int b with (Math.pow(2, n+1) - 1)? If so, then you are missing a * to signify a multiplication sign likely causing the error. You can read more about the error on this post:

Post on 'Cannot Find Symbol'

edited May 23 '17 at 12:31

Community

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answered May 14 '16 at 14:02

Andrew Li

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What does a “Cannot find symbol” compilation error mean here?

1 Answers1