Question

using if_else statement, design a grading system of the following criteria. >=90 'A',>=85 'A-1',80 'B+',75 'B',70 'B-',65 'C+', 60 'C', 55 'C-', 50 'P', and 50 'F'

Answer 1

One thing about an if-else is that the first thing it matches wins. Let me show you what I mean with some psudocode. If I use the > comparison and do the following:

Example 1:
if x > 50: result 1
else if x > 60: result 2

Example 2:
if x > 60: result 2
else if x > 50: result 1

Then test with the numbers 55 and 65, I will get different results. In Example 1, both 55 and 65 will get result 1 because they are both > 50. It will trigger result 1 and stop. By reordering and testing >60 first, I get result 2 for 65 and result 1 for 55.