# Program to print the number of elements present in an array

Program to print the number of elements present in an array on fibonacci, factorial, prime, armstrong, swap, reverse, search, sort, stack, queue, array, linkedlist, tree, graph etc.

## Q. Program to print the number of elements present in an array.

### Explanation

In this program, we need to count and print the number of elements present in the array.

A number of elements present in the array can be found by calculating the length of the array.

Length of above array is 5. Hence, the number of elements present in the array is 5.

### Algorithm

1. Declare and initialize an array.
2. Calculate the length of the array that is a number of elements present in the array.
3. An in-built function can calculate length.
4. Finally, print the length of the array.

### Python

Arrays in Python is declared as

```ArrayName = [ele1, ele2,...];
```

len() method returns the length of the array in Python.

```#Initialize array
arr = [1, 2, 3, 4, 5];

#Number of elements present in an array can be found using len()
print("Number of elements present in given array: " + str(len(arr)));
```

Output:

```Number of elements present in given array: 5
```

### C

Arrays in C are declared as

```datatype arrayName [size] = {element1, element2,..};
```

"sizeof" operator gives the size of the array in bytes so, to get the length of the array we divide the size of the array with the size of the first element.

```#include <stdio.h>

int main()
{
//Initialize array
int arr[] = {1, 2, 3, 4, 5};

//Number of elements present in an array can be calculated as follows
int length = sizeof(arr)/sizeof(arr[0]);

printf("Number of elements present in given array: %d", length);

return 0;
}
```

Output:

```Number of elements present in given array: 5
```

### JAVA

Arrays in Java are created using a new keyword as

```datatype [] arrayName  = new datatype[] {ele1, ele2,...};
```

length property is used to calculate the length of the array.

```public class CountArray {
public static void main(String[] args) {

//Initialize array
int [] arr = new int [] {1, 2, 3, 4, 5};

//Number of elements present in an array can be found using the length

System.out.println("Number of elements present in given array: " + arr.length);
}
}
```

Output:

```Number of elements present in given array: 5
```

### C#

Arrays in C# are created using new keyword as

```datatype [] arrayName  = new datatype[] {ele1, ele2,...};
```

Array. Length property is used to calculate the length of the array.

```using System;

public class CountArray
{
public static void Main()
{
//Initialize array
int [] arr = new int [] {1, 2, 3, 4, 5};

//Number of elements present in an array can be found using Length
Console.WriteLine("Number of elements present in given array: " + arr.Length);
}
}
```

Output:

```Number of elements present in given array: 5
```

### PHP

Arrays in PHP are declared using Array ():

```\$arrayName = Array (element1, element2,..);
```

count () is in-built function in PHP to get the length of array.

```<!DOCTYPE html>
<html>
<body>
<?php
//Initialize array
\$arr = array(1, 2, 3, 4, 5);

//Number of elements present in an array can be found using count()
print("Number of elements present in given array: " . count(\$arr));
?>
</body>
</html>
```

Output:

```Number of elements present in given array: 5
```

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