List Slices (Python)

Question

I am so confused in this question of list slices

squares = [0, 1, 4, 9, 16, 25, 36, 49, 64, 81]
print(squares[::2])
print(squares[2:8:3])

The second part of this question is little confusing for me . How?? the answer came ?

Can anybody helping to solve this problem .

Answer 1

squires[::2]
Start,end index not mentioned here so default it will 0 to length of list.. There 2 is step count to consider for next index so here values from 0 to len(squires) by step count 2 will be extracted so taken at indexes 0, 0+2, 2+2, 4+2, 6+2 are extracted 8+2 is out of range and end index is excluded..
Output : Values at indexes 0,2,4,6,8 are 0,4,16,36,64

squires[2:8:3]
slicing starts at index 2, upto 8(not inclusive) with step count 3 so indexes taken count are 2, 2+3=5, 5+3=8 but it is out of range given for slicing so only at indexes 2,5 are extracted those are 4,25.

Slicing syntax : list[start : end : step_count]
If start value ommited then default is 0.
For end, default value is len(list)
For step_count is 1 default value..

Answer 2

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https://www.sololearn.com/Discuss/2074551/?ref=app