Can you make an array of integers?

Can you make an array of integers?

Like an array of integers, we can also create an array of other primitive data types like char, float, double, etc., or user-defined data types (objects of a class). Thus, the element type for the array determines what type of data the array will hold.

Why is it not possible to declare an array of reference?

as we are not guaranteed that the memory locations of variables which are aliased by array of reference may not be in continuous memory. From the above assumption we can clearly tell that the array of references are not allowed as we are not guaranteed the address of variables which are aliased by array.

Is arr [] same as * arr?

The two have the same value but different types. When it’s used by itself (not the operand of & or sizeof ), arr evaluates to a pointer to int holding the address of the first int in the array. &arr evaluates to a pointer to array of three int s, holding the address of the array.

Are the expression &ARR and ARR different for an array of 15 integers?

Explanation: Yes, both mean two different things. ‘arr’ gives the address of first int, whereas the ‘&arr’ gives the address of array of ints. Therefore the expression ‘&arr’ and ‘arr’ are different for an array of 15 integers.

What do you mean by an array and how do you create an array?

An array is a data structure that contains a group of elements. Typically these elements are all of the same data type, such as an integer or string. While the program could create a new variable for each result found, storing the results in an array is much more efficient way to manage memory.

Which of the following syntax would you use to create an array of integers?

For example, to declare a variable, numbers that can hold an array of integers, we would use: int[] numbers; Since arrays are objects, we create arrays using new.

What is a reference of an array?

Array references can be used anywhere a reference to type Object is called for, and any method of Object can be invoked on an array. If you declare an array of objects, you get an array of object references. The objects themselves must be explicitly created with new and assigned to the elements of the array.

Can we assign null value to reference variable?

In C#, you can assign the null value to any reference variable. The null value simply means that the variable does not refer to an object in memory.

Are the expression arr and &arr same for an array of 10 integers?

Are the expressions arr and &arr same for an array of 10 integers? Explanation: Both mean two different things. arr gives the address of the first int, whereas the &arr gives the address of array of ints.

What’s the difference between array () and []?

There is no difference when you initialise array without any length. So var a = [] & var b = new Array() is same. But if you initialise array with length like var b = new Array(1); , it will set array object’s length to 1. So its equivalent to var b = []; b.

Are the expression array and and array same for an array of 10 integers?

No, both the statements are same.It is the prototype for the function fun that accepts one intrger array as a parameter and returns an integer value.

Why is it necessary to give the size of an array in an array declaration?

We need to give the size of the array because the complier needs to allocate space in the memory which is not possible without knowing the size. Compiler determines the size required for an array with the help of the number of elements of an array and the size of the data type present in the array.

What does the expression “(int*) arr”(where ARR is an array) mean?

What does the expression “ (int *) arr” (where arr is an array)mean? Enjoy productive Java with IntelliJ IDEA. Discover instant and clever code completion, on-the-fly code analysis, and reliable refactoring tools. It means the address of the first element of the array.

What is the difference between arr and &arr in C++?

The address is the same but both expressions are different. They just start at the same memory location. The types of both expressions are different. The value of arr is of type int * and the value of &arr is of type int (*) [3]. & is the address operator and the address of an object is a pointer to that object.

How to get the n-th element of an array in C?

In C (and probably many other languages too) array is implemented as a chunk of contiguous memory. To get the n-th array element, we basically tell the computer to get the address of the first element in memory and walk to the next element n-1 times.