Conditional statement simplification

Analyse which of these functions with conditional statements can be simplified. Then simplify those that can be simplified (removing the conditional statement).

1. def f1(a):
     if a > 0:
        b = a
     else:
        b = abs(a)
     return b
   

2. def f2(found):
     if found :
        equals = False
     else:
        equals = True
     return equals
   

3. def f3(a, b):
     if a != b :
        equals = False
     else:
        equals = True
     return equals
   

4. def f4(n):
     a = n%3
     if a == 0:
        b = 1
     elif a == 1:
        b = 2
     elif a == 2:
        b = 3
     return b
   

5. We have been given the following function avoidable. Discuss the result returned for the calls avoidable(a, 'A') with the following current values for parameter a: 10, 11, 12, 13 and 14.

   Next, analyse whether it can be simplified or not and, if, so, simplify it by removing the conditional statement

def avoidable (a, letter):
    b = a%4
    if b == 0:
        c = ''
    elif b == 1:
        c = letter
    elif b == 2:
        c = letter + letter
    else:
        c = b * letter
    return c

Solution

A solution is provided in file avoidables.py file.