masti masti - 4 months ago 12
Python Question

How to use comparison and ' if not' in python?

In one piece of my program I doubt if i use the comparison correctly. i want to make sure that ( u0 <= u < u0+step ) before do something.

if not (u0 <= u) and (u < u0+step):
u0 = u0+ step # change the condition until it is satisfied
else:
do something. # condition is satisfied

Answer

You can do:

if not (u0 <= u <= u0+step):
    u0 = u0+ step # change the condition until it is satisfied
else:
    do sth. # condition is satisfied

Using a loop:

while not (u0 <= u <= u0+step):
   u0 = u0+ step # change the condition until it is satisfied
do sth. # condition is satisfied