 # How To Find array size in C/C++ without using sizeof

Do you know what is Sizeof array in C/C++ programming language? Have you ever thought about how to find the length of array in C/C++ programming language & how to find the size of array CPP? Let us find out the process to gey size of array in C/C++ programming language.

But before we know what is sizeof array in C/C++ programming language & how to find the length of array in C/C++ programming language, let us try to understand the process using one daily life example. This will help to understand the process to find the size of array CPP.

Let us assume one daily life scenario to understand the process to gey size of array in C/C++ programming language.

Suppose, you visited your friend’s home. There you find a personal library of your friend. There are so many books placed in the library. His collection of books is very attractive. Now, you are wondering about this decoration of the library. And you asked your friend about the number of books present in the library. But your friend is unable to tell you that. As he was not always present while decorating the library.

So, what will be your approach to finding out the book number there?

You come to know that during the decoration of the library, your friend’s mother was present all the time. So, you asked his mother about the number of books present in the library. She replied to you with the exact number of the books. Hence, you come to know that only the proper authority will help to find the answers.

The same thing goes while finding the length of array in C/C++ programming language. When you need to know the size of array CPP, you need to know the accurate method to gey size of array in C/C++ programming language. And here, the perfect authority which will provide you with the length of the array is Sizeof. Let us try to know briefly about what is Sizeof array in C/C++ programming language. ## What Is Sizeof Array In C/C++ Programming Language? Read Below

Sizeof is a function in the C/C++ programming language. It is a built-in function provided by both C/C++ programming languages. This means this function is present in C programming language & C++ programming language. This function is mainly used to get the size of array CPP. Whatever the array is being declared in the programming language, this function will help to find out its size of it. Similar to finding out the number of the book in your friend’s library.

Not only the array, but the Sizeof operator or the function helps to get the size of anything in the C/C++ programming languages. This is used to get the size of any variable, constant, data type, etc. Using this function, the size can find out in the C/C++ programming language. So, this function is used widely in programming languages. But, you can also find out the length of array in C/C++ programming language without using the sizeof operator.

Sizeof array in C/C++ programming language works in a very simple method. Here, one variable needs to be declared. This variable is used to get the size of the array. Then we have to make an expression with the sizeof function. This will provide the sizeof array in C/C++ programming language. We have to provide the name of the array as an argument in the sizeof function. Then that function needs to be divided by the size of the element inserted in the function.

This means the first one will get the size of the total array. Then the size will be divided by the size of the array members. If there are integers present in the array, then the array size will be divided using the single integer size.

General Syntax: int variable = sizeof(array-name)/sizeof(array-name[any index of array]);

But here, we intend to develop a code that will not use Sizeof array in C/C++ programming language. Without using it, we have to get the gey size of array in C/C++ programming language. Let us find out the process for that.

## How To Find Length Of Array Without Using Sizeof Array In C/C++ Programming Language?

Usually, students like to prefer the process to use the sizeof function to get the length of the array. When there is a short process present, then why should we need to know more? But receiving more knowledge will help you to understand programming language in a better way. The alternative way to find out the length without using Sizeof array in C/C++ programming language is to use pointers.

Here first, we need to declare one array. Along with that, we have to provide elements in that array. Now, we have to use a pointer for that array. Using the ‘&’ operator we will find out the address of the array. Now, along with the address, we need to add 1. Adding this one will help you to get the number of elements present in the array. After that, we need to use the asterisk sign (*) to convert the number into the integer form.

As we need to get the answer into the integer format. At last, with this expression, we need to subtract the array. This will help to provide the answer which we needed. Let us find the example provided below.

Example:

```#include <bits/stdc++.h>

using namespace std;

int main()

{

int Zap[] = {10, 20, 30}; // Declaration Of Array

int CodingZap = *(&Zap + 1) - Zap; // Finding Size Of Array

cout << "Size Of Array: " << CodingZap;

return 0;

}```

Let us find out the output of the above-mentioned code. It will help to understand the process to find the length of array without using the sizeof array in C/C++ programming language.

Output: ## Conclusion:

As we saw it is very important to know the process to find the length of array without using the sizeof array in C/C++ programming language.

We need to go through the example provided there in this article. Also, we need to clarify the understanding related to the sizeof operator in C/C++ programming language.

Also, it is advised to clear the basics of the C/C++ programming languages. Mainly, you need to clear the pointers topic. This will help you to understand this topic more easily. This will help you in the future.

So, hope you have liked this piece of article. Share your thoughts in the comments section and let us know if we can improve more.

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