![What is an Array?
www.edureka.co/python
→ a
a[0] a[1] a[2] a[3…98] a[99]
1 2 3 … 100
Var_Name
Values →
Index →
Basic structure
of an Array:
An array is basically a data structure which can hold more than one value at a
time. It is a collection or ordered series of elements of the same type.](https://image.slidesharecdn.com/arraysinpython-190503122309/85/Arrays-In-Python-Python-Array-Operations-Edureka-4-320.jpg)
![❑ Access elements using index values.
❑ Indexing starts at 0 and not from 1. Hence, the index number is always 1 less than the length
of the array.
❑ Negative index values can be used as well. The point to remember is that negative indexing
starts from the reverse order of traversal i.e from right to left.
www.edureka.co/python
a[2]=3
Example: a[2]=3
Accessing Array Elements](https://image.slidesharecdn.com/arraysinpython-190503122309/85/Arrays-In-Python-Python-Array-Operations-Edureka-10-320.jpg)
![Lengthofanarrayisdeterminedusingthelen()functionasfollows:
Finding the length of an Array
import array as arr
a=arr.array('d', [1.1 , 2.1 ,3.1] )
len(a)
len(array_name)
Output- 3
SYNTAX:
www.edureka.co/python](https://image.slidesharecdn.com/arraysinpython-190503122309/85/Arrays-In-Python-Python-Array-Operations-Edureka-15-320.jpg)
![Thecodesnippetbelowimplementstheappend(),extend()andinsert() functions:
Adding elements to an Array
Array a= array('d', [1.1, 2.1, 3.1, 3.4])
Array b= array('d', [2.1, 3.2, 4.6, 4.5,
3.6, 7.2])
Array c=array('d', [1.1, 2.1,3.4, 3.1])
import array as arr
a=arr.array('d', [1.1 , 2.1 ,3.1] )
a.append(3.4)
print("Array a=",a)
b=arr.array('d',[2.1,3.2,4.6])
b.extend([4.5,3.6,7.2])
print("Array b=",b)
c=arr.array( 'd' , [1.1 , 2.1 ,3.1] )
c.insert(2,3.4)
print(“Arrays c=“,c)
OUTPUT-
www.edureka.co/python](https://image.slidesharecdn.com/arraysinpython-190503122309/85/Arrays-In-Python-Python-Array-Operations-Edureka-18-320.jpg)
![Thecodesnippetbelowshowshowyoucanremoveelementsusingthesetwofunctions:
import array as arr
a=arr.array('d', [1.1, 2.2, 3.8, 3.1, 3.7])
print(“Popping last element”,a.pop())
print(“Popping 4th element”,a.pop(3))
a.remove(1.1)
print(a)
Popping last element 3.7
Popping 4th element 3.1
array('d', [2.2, 3.8])
OUTPUT-
Removing elements of an Array
www.edureka.co/python](https://image.slidesharecdn.com/arraysinpython-190503122309/85/Arrays-In-Python-Python-Array-Operations-Edureka-21-320.jpg)
![Arrayconcatenation canbedoneasfollowsusingthe+symbol:
Array Concatenation
import array as arr
a=arr.array('d',[1.1 , 2.1 ,3.1,2.6,7.8])
b=arr.array('d',[3.7,8.6])
c=arr.array('d’)
c=a+b
print("Array c = ",c)
Array c= array(‘d’, [1.1, 2.1, 3.1, 2.6,
7.8, 3.7, 8.6])
OUTPUT-
www.edureka.co/python](https://image.slidesharecdn.com/arraysinpython-190503122309/85/Arrays-In-Python-Python-Array-Operations-Edureka-23-320.jpg)
![Slicing an Array
import array as arr
a=arr.array('d',[1.1 , 2.1 ,3.1,2.6,7.8])
print(a[0:3])
OUTPUT -
array(‘d’, [1.1, 2.1, 3.1])
An array can be sliced using the : symbol. This returns a range of elements that we have
specified by the index numbers.
www.edureka.co/python](https://image.slidesharecdn.com/arraysinpython-190503122309/85/Arrays-In-Python-Python-Array-Operations-Edureka-25-320.jpg)
![Some of the for loop implementations are:
import array as arr
a=arr.array('d', [1.1, 2.2, 3.8, 3.1, 3.7])
print("All values")
for x in a:
print(x)
Allvalues
1.1
2.2
3.8
3.1
3.7
OUTPUT-
Looping through an Array using for loop
www.edureka.co/python](https://image.slidesharecdn.com/arraysinpython-190503122309/85/Arrays-In-Python-Python-Array-Operations-Edureka-28-320.jpg)
![Example for while loop implementation
Looping through an Array using while loop
import array as arr
a=arr.array('d', [1.1, 2.2, 3.8, 3.1, 3.7])
b=0
while b<len(a):
print(a[b])
b=b+1
1.1
2.2
3.8
3.1
3.7
OUTPUT-
www.edureka.co/python](https://image.slidesharecdn.com/arraysinpython-190503122309/85/Arrays-In-Python-Python-Array-Operations-Edureka-29-320.jpg)
![What is an Array?
www.edureka.co/python
→ a
a[0] a[1] a[2] a[3…98] a[99]
1 2 3 … 100
Var_Name
Values →
Index →
Basic structure
of an Array:
An array is basically a data structure which can hold more than one value at a
time. It is a collection or ordered series of elements of the same type.](https://image.slidesharecdn.com/arraysinpython-190503122309/75/Arrays-In-Python-Python-Array-Operations-Edureka-4-2048.jpg)
![❑ Access elements using index values.
❑ Indexing starts at 0 and not from 1. Hence, the index number is always 1 less than the length
of the array.
❑ Negative index values can be used as well. The point to remember is that negative indexing
starts from the reverse order of traversal i.e from right to left.
www.edureka.co/python
a[2]=3
Example: a[2]=3
Accessing Array Elements](https://image.slidesharecdn.com/arraysinpython-190503122309/75/Arrays-In-Python-Python-Array-Operations-Edureka-10-2048.jpg)
![Lengthofanarrayisdeterminedusingthelen()functionasfollows:
Finding the length of an Array
import array as arr
a=arr.array('d', [1.1 , 2.1 ,3.1] )
len(a)
len(array_name)
Output- 3
SYNTAX:
www.edureka.co/python](https://image.slidesharecdn.com/arraysinpython-190503122309/75/Arrays-In-Python-Python-Array-Operations-Edureka-15-2048.jpg)
![Thecodesnippetbelowimplementstheappend(),extend()andinsert() functions:
Adding elements to an Array
Array a= array('d', [1.1, 2.1, 3.1, 3.4])
Array b= array('d', [2.1, 3.2, 4.6, 4.5,
3.6, 7.2])
Array c=array('d', [1.1, 2.1,3.4, 3.1])
import array as arr
a=arr.array('d', [1.1 , 2.1 ,3.1] )
a.append(3.4)
print("Array a=",a)
b=arr.array('d',[2.1,3.2,4.6])
b.extend([4.5,3.6,7.2])
print("Array b=",b)
c=arr.array( 'd' , [1.1 , 2.1 ,3.1] )
c.insert(2,3.4)
print(“Arrays c=“,c)
OUTPUT-
www.edureka.co/python](https://image.slidesharecdn.com/arraysinpython-190503122309/75/Arrays-In-Python-Python-Array-Operations-Edureka-18-2048.jpg)
![Thecodesnippetbelowshowshowyoucanremoveelementsusingthesetwofunctions:
import array as arr
a=arr.array('d', [1.1, 2.2, 3.8, 3.1, 3.7])
print(“Popping last element”,a.pop())
print(“Popping 4th element”,a.pop(3))
a.remove(1.1)
print(a)
Popping last element 3.7
Popping 4th element 3.1
array('d', [2.2, 3.8])
OUTPUT-
Removing elements of an Array
www.edureka.co/python](https://image.slidesharecdn.com/arraysinpython-190503122309/75/Arrays-In-Python-Python-Array-Operations-Edureka-21-2048.jpg)
![Arrayconcatenation canbedoneasfollowsusingthe+symbol:
Array Concatenation
import array as arr
a=arr.array('d',[1.1 , 2.1 ,3.1,2.6,7.8])
b=arr.array('d',[3.7,8.6])
c=arr.array('d’)
c=a+b
print("Array c = ",c)
Array c= array(‘d’, [1.1, 2.1, 3.1, 2.6,
7.8, 3.7, 8.6])
OUTPUT-
www.edureka.co/python](https://image.slidesharecdn.com/arraysinpython-190503122309/75/Arrays-In-Python-Python-Array-Operations-Edureka-23-2048.jpg)
![Slicing an Array
import array as arr
a=arr.array('d',[1.1 , 2.1 ,3.1,2.6,7.8])
print(a[0:3])
OUTPUT -
array(‘d’, [1.1, 2.1, 3.1])
An array can be sliced using the : symbol. This returns a range of elements that we have
specified by the index numbers.
www.edureka.co/python](https://image.slidesharecdn.com/arraysinpython-190503122309/75/Arrays-In-Python-Python-Array-Operations-Edureka-25-2048.jpg)
![Some of the for loop implementations are:
import array as arr
a=arr.array('d', [1.1, 2.2, 3.8, 3.1, 3.7])
print("All values")
for x in a:
print(x)
Allvalues
1.1
2.2
3.8
3.1
3.7
OUTPUT-
Looping through an Array using for loop
www.edureka.co/python](https://image.slidesharecdn.com/arraysinpython-190503122309/75/Arrays-In-Python-Python-Array-Operations-Edureka-28-2048.jpg)
![Example for while loop implementation
Looping through an Array using while loop
import array as arr
a=arr.array('d', [1.1, 2.2, 3.8, 3.1, 3.7])
b=0
while b<len(a):
print(a[b])
b=b+1
1.1
2.2
3.8
3.1
3.7
OUTPUT-
www.edureka.co/python](https://image.slidesharecdn.com/arraysinpython-190503122309/75/Arrays-In-Python-Python-Array-Operations-Edureka-29-2048.jpg)
Uploaded byEdureka!
Arrays In Python | Python Array Operations | Edureka
The document provides an overview of arrays in Python, detailing their creation, properties, and operations such as addition, removal, concatenation, slicing, and looping. It distinguishes between Python lists and arrays, emphasizing that arrays store a single data type while lists can contain mixed data types. Additionally, it covers how to access elements using indexing and various basic functions for manipulating arrays.
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Arrays In Python | Python Array Operations | Edureka
- 2. What is anArray? How to Create an Array in Python? Is Python List same as an Array? Basic Array Operations • Finding the length of an Array • Addition • Removal • Concatenation • Slicing • Looping Accessing Array Elements www.edureka.co/python
- 3. What is anArray? www.edureka.co/python
- 4. What is anArray? www.edureka.co/python → a a[0] a[1] a[2] a[3…98] a[99] 1 2 3 … 100 Var_Name Values → Index → Basic structure of an Array: An array is basically a data structure which can hold more than one value at a time. It is a collection or ordered series of elements of the same type.
- 5. Is Python Listsame as an Array? www.edureka.co/python
- 6. Is Python Listsame as an Array? Python Arrays and lists have the same way of storing data. Arrays take only a single data type elements but lists can have any type of data. Therefore, other than a few operations, the kind of operations performed on them are different. www.edureka.co/python
- 7. How to createArrays in Python? www.edureka.co/python
- 8. Arrays in Pythoncan be created after importing the array module. How to create Arrays in Python? → from array import * USING * 3 → import array → import array as arr WITHOUT ALIAS 1 USING ALIAS 2 www.edureka.co/python
- 9. Accessing Array Elementswww.edureka.co/python
- 10. ❑ Access elementsusing index values. ❑ Indexing starts at 0 and not from 1. Hence, the index number is always 1 less than the length of the array. ❑ Negative index values can be used as well. The point to remember is that negative indexing starts from the reverse order of traversal i.e from right to left. www.edureka.co/python a[2]=3 Example: a[2]=3 Accessing Array Elements
- 11. Basic Array Operationswww.edureka.co/python
- 12. Operations Removing/ Deleting elements ofan array Slicing Looping through an Array Basic Array Operations Adding/ Changing element of an Array Finding the length of an Array Array ConcatenationArray Concatenation www.edureka.co/python
- 13. Finding the lengthof an Array www.edureka.co/python
- 14. ❑ Length ofan array is the number of elements that are actually present in an array. ❑ You can make use of len() function to achieve this. ❑ The len() function returns an integer value that is equal to the number of elements present in that array. Finding the length of an Array www.edureka.co/python
- 15. Lengthofanarrayisdeterminedusingthelen()functionasfollows: Finding the lengthof an Array import array as arr a=arr.array('d', [1.1 , 2.1 ,3.1] ) len(a) len(array_name) Output- 3 SYNTAX: www.edureka.co/python
- 16. Adding elements toan Array www.edureka.co/python
- 17. js Insert()extend()append() Used when youwant to add a single element at the end of an array. Used when you want to add more than one element at the end of an array. Used when you want to add an element at a specific position in an array. Functions used to add elements to an Array: Adding elements to an Array www.edureka.co/python
- 18. Thecodesnippetbelowimplementstheappend(),extend()andinsert() functions: Adding elementsto an Array Array a= array('d', [1.1, 2.1, 3.1, 3.4]) Array b= array('d', [2.1, 3.2, 4.6, 4.5, 3.6, 7.2]) Array c=array('d', [1.1, 2.1,3.4, 3.1]) import array as arr a=arr.array('d', [1.1 , 2.1 ,3.1] ) a.append(3.4) print("Array a=",a) b=arr.array('d',[2.1,3.2,4.6]) b.extend([4.5,3.6,7.2]) print("Array b=",b) c=arr.array( 'd' , [1.1 , 2.1 ,3.1] ) c.insert(2,3.4) print(“Arrays c=“,c) OUTPUT- www.edureka.co/python
- 19. Removing elements ofan Array www.edureka.co/python
- 20. Removing elements ofan Array js pop() remove() Used when you want to remove an element and return it. Used when you want to remove an element with a specific value without returning it. Functions used to remove elements of an Array: www.edureka.co/python
- 21. Thecodesnippetbelowshowshowyoucanremoveelementsusingthesetwofunctions: import array asarr a=arr.array('d', [1.1, 2.2, 3.8, 3.1, 3.7]) print(“Popping last element”,a.pop()) print(“Popping 4th element”,a.pop(3)) a.remove(1.1) print(a) Popping last element 3.7 Popping 4th element 3.1 array('d', [2.2, 3.8]) OUTPUT- Removing elements of an Array www.edureka.co/python
- 22.
- 23. Arrayconcatenation canbedoneasfollowsusingthe+symbol: Array Concatenation importarray as arr a=arr.array('d',[1.1 , 2.1 ,3.1,2.6,7.8]) b=arr.array('d',[3.7,8.6]) c=arr.array('d’) c=a+b print("Array c = ",c) Array c= array(‘d’, [1.1, 2.1, 3.1, 2.6, 7.8, 3.7, 8.6]) OUTPUT- www.edureka.co/python
- 24.
- 25. Slicing an Array importarray as arr a=arr.array('d',[1.1 , 2.1 ,3.1,2.6,7.8]) print(a[0:3]) OUTPUT - array(‘d’, [1.1, 2.1, 3.1]) An array can be sliced using the : symbol. This returns a range of elements that we have specified by the index numbers. www.edureka.co/python
- 26. Looping through anArray www.edureka.co/python
- 27. js for while Iterates overthe items of an array specified number of times. Iterates over the elements until a certain condition is met. We can loop through an array easily using the for and while loops. Looping through an Array www.edureka.co/python
- 28. Some of thefor loop implementations are: import array as arr a=arr.array('d', [1.1, 2.2, 3.8, 3.1, 3.7]) print("All values") for x in a: print(x) Allvalues 1.1 2.2 3.8 3.1 3.7 OUTPUT- Looping through an Array using for loop www.edureka.co/python
- 29. Example for whileloop implementation Looping through an Array using while loop import array as arr a=arr.array('d', [1.1, 2.2, 3.8, 3.1, 3.7]) b=0 while b<len(a): print(a[b]) b=b+1 1.1 2.2 3.8 3.1 3.7 OUTPUT- www.edureka.co/python
- 30.