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What is the scope of local variables in Java?
Scope of a variable denotes span of a variable.
The scope of a local variable is within that method i.e. when we create a variable with in a method, it cannot be accessed outside that method.
Example
If you observe the following example here, we have created a variable named num in the main method and, trying to access it in another method (demo).
public class SampleTest {
String str = "sampleString";
public static void main(String args[]){
int num = 334;
}
public void demo(){
System.out.println(num);
}
}
Error
Since we cannot access a local variable (variable of a method) outside it, the compiler generates an error as −
C:\Sample>javac SampleTest.java
SampleTest.java:7: error: cannot find symbol
System.out.println(num);
^
symbol: variable num
location: class SampleTest
1 error
Updated on 30-Jul-2019 22:30:20
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