Can someone help me understand

Question

So I’m learning list comprehension, I don’t seem t understand the first example of code it gives me.

Cubes = [i**3 for i in range(5)]
print(cubes)

Output: [0, 1, 8, 27, 64]

I just don’t understand where these numbers are coming from.
I know if if only do i*3 it outputs multiples of 3. And if i do i+3 it starts the list at 3 and adds 1 for every new number. I just don’t get what i**3 is doing.

Answer 1

Juat as what Hari Shankar said, “**” operater is for exponent, for example 2**3 means 2*2*2, and 3**2 means 3*3 and so on.

Cubes = [i ** 3 for i in range(5)]

Understand this from inside out. range(5) gives [0,1,2,3,4], so it comes to “for i in [0,1,2,3,4]”, which means i is 1, and then 2, and then 3, and so on.

Now we come to “i ** 3 for i in [0,1,2,3,4]”, this means for each i, we calculate i ** 3.

Which means:
i = 0 => i**3 = 0
i = 1 => i**3 = 1
i = 2 => i**3 = 8
i = 3 => i**3 = 27
i = 4 => i**3 = 64

Now we come to “Cubes = [i ** 3 for i in range(5)]”, which just means to list the previous results and assign the list to the variable “Cubes”.

Therefore, “print(Cubes)” prints the list, which is [0,1,8,27,64]

Alan

Answer 2

'**' is Exponent operator. i**3 means i to the power 3. range(5) will give you list [0,1,2,3,4]. This statement is calculating cube of each element of this list and stores it in another list named 'Cubes'. Then print 'Cubes'.

Answer 3

QWKKK thanks for explaining it like that, now it makes so much sense. You are a life savior!!