#   some basic bool examples.

x = True
y = False

print(f"x: {x}")
print(f"y: {y}")

print(f"not(x): {not(x)}")
print(f"x and y: {x and y}")
print(f"x and not y: {x and not y}")
print(f"x or y: {x or y}")

print("Short circuit evaluations")
li = [10,20]
print(f"li[1]: {li[1]}")
if li[1]:
    print(f"li[1]: true")
else:
    print(f"li[1]: true")

k = 4
print(f"k: {k}")

try:
    if li[k]:
        print(f"li[k]: true")
except IndexError:
    print("Index out of range error for li[k]")

try:
    if x or li[k]:
        print(f"x or li[k]: true")
    else:
        print(f"x or li[k]: false")
except IndexError:
    print("Index out of range error for 'x or li[k]'")
    
try:
    if x and li[k]:
        print(f"x and li[k]: true")
    else:
        print(f"x and li[k]: false")  
except IndexError:
    print("Index out of range error for 'x and li[k]'")
    
try:
    if y and li[k]:
        print(f"y and li[k]: true")
    else:
        print(f"y and li[k]: false")  
except IndexError:
    print("Index out of range error for 'y and li[k]'")
 
try:
    if y or li[k]:
        print(f"y or li[k]: true")
    else:
        print(f"y or li[k]: false")  
except IndexError:
    print("Index out of range error for 'y or li[k]'")