**numel()**function in MATLAB enables us to compute the total number of elements in a database, array, or other data structure. This function is similar to the

**size()**function, but the

**size()**function returns the number of rows and columns in a matrix. The

**numel()**function is useful for a variety of tasks, such as determining the size of a data structure, iterating over a data structure, and allocating memory for a data structure.

This guide is going to present the implementation of the **numel()** function in MATLAB using its syntax with the help of examples.

**How to Use the numel Function in MATLAB?**

The **numel() **is a built-in function in MATLAB that enables MATLAB users to determine the total number of elements in a database or an array. This function takes an array or a database as an input and provides the total number of elements present in it.

**Syntax**

The **numel()** function can be implemented in MATLAB through the following syntax:

Here,

The function **n = numel(A) **is responsible for finding the total number of elements in an array A. In other words, **numel(A)= prod(size(A))**.

- If A represents a vector, numel(A)=length(A).
- If A represents a matrix, this function provides the product of the number of rows and the number of columns of the given matrix.
- If A represents a multidirectional array, this function provides the product of all dimensions of the given array A.

**Example 1: How to Find the Number of Elements of a Vector, Matrix, or Array in MATLAB?**

This MATLAB code determines the **total number of elements **in the given vector, matrix, or array using the **numel() **function.

A = magic(100);

Arr(:,:,5) = A;

V_n = numel(V)

A_n = numel(A)

Arr_n = numel(Arr)

**Example 2: How to Compute the Number of Elements in the fi Array in MATLAB?**

**Fi array** is a fixed-point array that has a fixed bits number to show integer and fractional parts of the number. In this example, we create a 2-by-2 fi array using the **fi() **function and use the **numel() **function to find the **number of elements** n in the fi array A.

**Conclusion**

Finding the total number of elements is a common task that can be done using the built-in **numel() **function in MATLAB. The function is easy to use and only accepts a matrix as a parameter and provides the number of elements as an output. We have provided examples for finding the number of elements in an array, vector, or matrix using the **numel()** function. We have also described an example for the fi array as well.