Declaring an array does not initialize it. In order to store values in the array, we must initialize it first, the syntax of which is as follows: datatype [ ] arrayName = new datatype [size]; ... Look at the following examples to get a better idea about array initialization.

Are arrays automatically initialized?

Yes, for primitive types(except boolean and char) it will be default to ZERO. If object type it will be default to null .

How an array is initialized and declared?

Arrays may be initialized when they are declared, just as any other variables. ... The remaining array elements will be automatically initialized to zero. If an array is to be completely initialized, the dimension of the array is not required. The compiler will automatically size the array to fit the initialized data.