var keyword in Java

• We declare local variables in a method with its data type.

        

• From Java 10 or higher version onwards , we can use var keyword to declare local variables in a method. Same variables can be declared with var keyword like below.

• Java compiler takes the variables type from it's initializer. 20 is integer value, so age data type is int. 
• You can use var keyword to declare reference variables.

• You can use var to declare variable inside for loop, forEach loop.

 

• You can use var keyword as variable name also.

Restrictions :

• You can't use var to declare a variable without initializing it. You can't use with null variables.

    

• You can't use var to declare multiple variables in single declaration.

    

• You can't use var to declare array initializer .

    

• You can't use var to declare class level instance , static variables.

• You can't use var keyword to declare method parameters.

• You can't use var as method return type.

Conclusion:

var keyword is good addition to Java programming language. It shortens the variables declaration. This is all for today. Happy Coding 😀