Groovy Optional Datatype Declaration (Duck Typing) Step 10

Java is a statically typed language. That means that each variable has to have a datatype when you declare it. Groovy, on the other hand, allows you to define variables without a datatype.

For example:

def name='Greg' means that the variable name is a String. The keyword def means that it doesn't much care what type the variable is.

You can write,

def y="Hello"

String z="Hello"

println w.class

println w.class==x.class

Go To Step 11