Why this!? (3.0)

Question

for python:
nums= list(range(-10))
print(nums)
output:
[ ]

Why its giving empty braces as output?

Answer 1

nums= list(range(-10,0))
print(nums)

Try above.

Read below things and understand the solution.

Syntax : range(start, stop[, step])

It takes three arguments. Out of the three 2 arguments are optional. I.e., start and step are the optional arguments.

A start argument is a starting number of the sequence. i.e., lower limit. By default, it starts with 0 if not specified.

A stop argument is an upper limit. i.e., generate numbers up to this number, The range() doesn’t include this number in the result.

The step is a difference between each number in the result. The default value of the step is 1 if not specified.

Answer 2

range(-10) takes 0 as starting value and -10 as ending value. Since by default (when 'step' is not defined) start must be less than end, no numbers are generated.

In order to generate numbers you can:
1) invert start and end, as others suggested: range(-10, 0)
2) explicitly add a negative step: range(0,-10,-1)