Difference between 'num for num in range' and 'for num in range' (Python)

While studying Python, I wondered about 'num for num in range' and 'for num in range'.

 

They seemed similar yet had different use cases, and I needed to understand when to use each in different situations.

 

 

Here are explanations:

1. `num for num in range` (List Comprehension):

   # List Comprehension Example: Creating a list with numbers from 0 to 4
   my_list = [num for num in range(5)]
   print(my_list)  
   
   # Output: [0, 1, 2, 3, 4]

   In this example, `num for num in range` adds each number `num` generated by `range(5)` to the list, creating a new list.

 

 

2. `for num in range` (Regular `for` loop):

   # Regular for loop Example: Iterating over numbers from 0 to 4 and printing them
   for num in range(5):
       print(num)  
       
       # Output: 0, 1, 2, 3, 4 (each number is printed on a separate line)

   In this example, `for num in range` iterates over each number generated by `range(5)` and performs a specific task. Here, the task is printing each number.

Both these constructs iterate over the same `range(5)`, but the List Comprehension creates a new list, while the Regular `for` loop performs a specific task for each number.