suppose we have python list
a=[1,2,3]
print(a[0]) will output 1
print(a[0:3]) will output [1,2,3]
print(a[4]) will output **IndexError: list index out of range**
But
print(a[0:4]) will output [1,2,3]
Why I am not getting error of IndexError: list index out of range this time? Also same for
a[3:4] i will get empty [] but not the error
