{"id":637,"date":"2016-01-19T14:03:35","date_gmt":"2016-01-19T14:03:35","guid":{"rendered":"http:\/\/abhiandroid.com\/java\/?p=637"},"modified":"2016-01-19T14:03:35","modified_gmt":"2016-01-19T14:03:35","slug":"local-variable-example","status":"publish","type":"post","link":"https:\/\/abhiandroid.com\/java\/local-variable-example.html","title":{"rendered":"Local Variable With Example In JAVA"},"content":{"rendered":"

A local variable is a variable declared inside a method body, block or constructor. It means variable is only accessible inside the method, block or constructor that declared it.<\/p>\n

Important Note: <\/strong><\/span>In java, a block i.e. “area between opening and closing curly brace” defines a scope. Each time you start a new block, you begin a new scope.<\/p>\n

Scope of Local Variable:<\/strong><\/span><\/p>\n

Scope of local variable are limited to method. Such a variable is accessible only within the method or block in which it is declared. The local variable’s scope starts from the line they are declared and their scope remains there until the closing curly brace of the method comes.<\/p>\n

Declaration of Local Variable:<\/strong><\/span><\/p>\n

Every local variable declaration statement is contained by a block ({ … }). We can also declare the local variables in the header of a \u201cfor\u201d statement. In this case it is executed in the same manner as if it were part of a local variable declaration statement.<\/p>\n

For example<\/strong>: for(int i=0;i<=5;i++){\u2026\u2026}<\/code><\/p>\n

In above example int i=0 is a local variable declaration. Its scope is only limited to the for loop.<\/p>\n

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Syntax Of Local Variable:<\/strong><\/h4>\n
methodname(){\r\n<DataType> localvarName;\r\n}<\/pre>\n
Here methodname is the name of method, DataType refers to data type of variable like int, float etc and localvarName is the name of local variable.<\/p>\n
Example of Sytax of Local variable<\/p>\n
int area()\r\n\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0int length=10; \/\/local variable\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0int breadth = 5; \/\/local variable\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0int rectarea = length*breadth; \/\/local variable\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0return rectarea;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0}<\/pre>\n
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Program Example of Local Variable With Explanation:<\/strong><\/h4>\n
Let us take an example in which we take local variable to explain it. Here,\u00a0age<\/strong>\u00a0is a local variable. This variable is defined under putAge()<\/strong>\u00a0method and its scope is limited to this method only:<\/p>\n
public class Dog\r\n\r\n{\r\n\r\n\u00a0\u00a0 \u00a0public void putAge()\r\n\r\n\u00a0\u00a0 \u00a0{\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0int age = 0; \/\/local variable\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0age = age + 6;\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0System.out.println(\"Dog age is : \" + age);\r\n\u00a0\u00a0 \u00a0}\r\n\r\n\u00a0\u00a0 \u00a0public static void main(String args[]){\r\n\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0Dog d = new Dog();\r\n\u00a0\u00a0 \u00a0\u00a0\u00a0 \u00a0d.putAge();\r\n\r\n\u00a0\u00a0 \u00a0}\r\n\r\n}<\/pre>\n
Output:<\/strong><\/p>\n
Dog age is : 6<\/pre>\n
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Important Points To Remember:<\/strong><\/h4>\n