What is the difference between for loop and while loop in Python
While loops, unlike a for loop, the while loop will not run n times, but until a defined condition is no longer met. If the condition is initially false, the loop body will not be executed at all.
The for statement iterates through a collection or iterable object or generator function. The while statement simply loops until a condition is False.
The for statement iterates through a collection or iterable object or generator function. The while statement simply loops until a condition is False.
Differences between a list and an array in python
- A list is a container of objects and can hold elements of different data types
- Lists are built-in data types in python, so no import is needed to use them
- A list is flexible and can be changed after its creation.
- Some arithmetic operations are supported and they are not element-wise
- An entire list can be printed without a loop
- A list does not use memory efficiently and is typically slower than an array
- An array is a container of objects and can hold elements of the same data type only
- Arrays are not built-in data types in python, so an import is needed to use them
- Once an array is defined, its size is fixed and cannot be changed
- All arithmetic operations are supported and are element-wise
- A loop is needed to print an entire array
- An array uses memory efficiently and is typically faster than a list
|
Though lists and arrays are containers of data and can be indexed and sliced, there are many differences between them:
|
|
A list is a container of objects and can hold elements having different data types.
An array is a container of objects and can hold elements of the same data type only. |
|
Lists are built-in data types in python, so no import is needed to use them
Arrays are not built-in data types in python, so an import is needed to use them |
|
Not all arithmetic operations are supported and supported ones are not element-wise
All arithmetic operations are supported and are element-wise |
|
A list is flexible and can change after its creation. Elements can be added, deleted or modified
Once the array is defined, the space it occupies in memory, a combination of the number of its elements and the size of each element, is fixed and cannot be changed. The only thing you can do is to create a new array and replace some of its elements by the elements of the original array. |
|
An entire list can be printed without a loop
A loop is needed to print an entire array |
|
A list does not use memory efficiently and is typically slower than an array
An array uses memory efficiently and is typically faster than a list |
