java beginner - cannot find symbol -

this question has answer here:

• what “cannot find symbol” compilation error mean? 7 answers

i beginner in java , trying create program recieves input numbers in terminal, , continuously ask new numbers until 0 entered. after 0 has been entered want program summarize of numbers , plus them together. when try compile program error:

heres code:

import java.util.scanner;  public class sumtall {     public static void main(string[] args) {         scanner tallscanner = new scanner(system.in);         int tall = 0;         int tall1;          system.out.println("write number:");         tall1 = integer.parseint(tallscanner.nextline());          while(tall1 > 0) {             system.out.println("write number:");             tall1 = integer.parseint(tallscanner.nextline());             int tall2 = tall + tall1;         }         if(tall1 == 0) {             system.out.println(tall2);         }     } } 

you declared tall2 in while block declare outside while. stick block in case belong while block trying access variavle tall2 out side while that's reason can see error. hope you.

i changed declaration part out side.

import java.util.scanner;  public class sumtall {     public static void main(string[] args) {         scanner tallscanner = new scanner(system.in);         int tall = 0;         int tall1,tall2;          system.out.println("write number:");         tall1 = integer.parseint(tallscanner.nextline());          while(tall1 > 0) {             system.out.println("write number:");             tall1 = integer.parseint(tallscanner.nextline());             tall2 = tall + tall1;         }         if(tall1 == 0) {             system.out.println(tall2);         }     } }