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What Are The Data Types For Which It Is Not Possible To Create An Array?
In programming, arrays are like containers for storing data. However, not all types of data can be put into these containers. Some data types are too complex or change in size, and for them, we can’t use arrays. This article will explain which types these are and why. Understanding this helps us use the right tools in our programming work.
- Arrays of void: The C standard doesn’t allow you to create arrays of type
voidbecause the size of elements in an array needs to be known at compile time. Sincevoidrepresents an incomplete or unknown data type, you can’t create an array withvoidelements. - Arrays of functions: While you can have arrays of function pointers, you cannot have arrays of function types themselves. In C, function types are not first-class types that you can create arrays of directly. However, you can create an array of function pointers, each pointing to a function of the same type.
Example 1 – To show compiler error
int main()
{
void arr[100];
}Output
error: declaration of 'arr' as array of voids
Example 2- To illustrate the void pointers and function pointers
int main()
{
void *arr[100];
}FAQ- What Are The Data Types For Which It Is Not Possible To Create An Array?
Q1. What kind of data can an array not store?
Ans. In Java, ArrayList can’t directly hold primitive data types like int, double, char, and long. However, you can use wrapper classes (e.g., Integer, Double) to store and retrieve these primitive types in an ArrayList through autoboxing and auto-unboxing.
Q2. What data type data types can an array hold?
Ans. Arrays in Stan are flexible and can hold various types, making them essential for storing sequences of integers, required for functions like discrete distributions.
Q3. What type of data type is an array?
Ans. An array type in programming is a user-defined data type that comprises a sequence of elements, all of the same data type. Ordinary arrays have a fixed size and use ordinal positions as indices.
Hello, I’m Hridhya Manoj. I’m passionate about technology and its ever-evolving landscape. With a deep love for writing and a curious mind, I enjoy translating complex concepts into understandable, engaging content. Let’s explore the world of tech together