##    
### Arrays of different datatypes (type codes)


| Type code | C type | Python type | Minimum size in bytes |
|-----------|--------|-------------|-----------------------|
| b         |  signed char| int| 1|
| B         | unsigned char | int | 1 |
| u| Py_code | unicode character | 2 |
| h | signed short | int | 2 |
| H | unsigned short | int | 2|
| i | signed int | int | 2|
| I | unsigned int | int |2 |
| l | signed long | int | 4 |
|L | unsigned long | int | 4 |
|q | signed long long | int | 8|
| Q | unsigned long long | int | 8 |
| f | float | float |4 |
|d | double | float | 8|



### Syntax
```
array(data_type,value_list)
```
Here, the `data_type` or type_code indicates the type of contents of the array.

For example:
```python
import array from arr
arr=array("i",[1,2,3,4,5,6])
print(arr)
```
`"i"` indicates that the contents are of integer type.

##   
### Array methods
Python supports various built-in methods that can be used for arrays.

The methods that are supported are as follows:

| Method| Description|
|------|-----------------------------|
|append(x)|Adds a new item with value x to the end of the array|
|extend()|Adds the elements of the list to the end of the current array|
|insert(i,x)| Adds an item with value x in the array before position i|
|remove(x)|Removes the first occurrence of x from the array|
|pop(i)|Removes the item with index i from the array |
|clear()| Removes all the elements from the array|
|copy()|Returns a copy of the array|
|count(x)|Returns the number of occurrences of x in the array|
|index(x)|Returns the index_value(position) for the first occurrence of x in the array|
|reverse()|Reverses the order of the items in the array|
|sort()|Sorts the array|

### Code


import array as arr
a=arr.array("i", [1,2,3,4,5,6] )
print(len(a))

len()

import array as arr
a=arr.array('i', [1,2,3] )
a.append(4)
print(a)

append()

import array as arr
a=arr.array('i', [1,2,3] )
a.extend([4,5,6,7,8,9,10])
print(a)

extend()

import array as arr
a=arr.array('i', [1,2,3] )
a.insert(2,4)
print(a)

insert()

import array as arr
a=arr.array('i', [1,2,3,4,5,6,7,8])
a.remove(1)
print(a)

remove()

import numpy as np
x = np.array([1,2,3,4,5,6]) 
y = np.copy(x) 
print("Original array:", x) 
print("After copying:", y) 

copy()

import array as arr
x=arr.array("i",[1,2,3,4,6,5,6,6,7,6])
print(x.count(6))

Type code	C type	Python type	Minimum size in bytes
b	signed char	int	1
B	unsigned char	int	1
u	Py_code	unicode character	2
h	signed short	int	2
H	unsigned short	int	2
i	signed int	int	2
I	unsigned int	int	2
l	signed long	int	4
L	unsigned long	int	4
q	signed long long	int	8
Q	unsigned long long	int	8
f	float	float	4
d	double	float	8

Method	Description
append(x)	Adds a new item with value x to the end of the array
extend()	Adds the elements of the list to the end of the current array
insert(i,x)	Adds an item with value x in the array before position i
remove(x)	Removes the first occurrence of x from the array
pop(i)	Removes the item with index i from the array
clear()	Removes all the elements from the array
copy()	Returns a copy of the array
count(x)	Returns the number of occurrences of x in the array
index(x)	Returns the index_value(position) for the first occurrence of x in the array
reverse()	Reverses the order of the items in the array
sort()	Sorts the array

What are type codes and methods in arrays in Python?

Arrays of different datatypes (type codes)

Syntax

Array methods

Code