# examples of conditional expressions
#
# Matt Bishop, MHI 289I, Winter 2019
#
# first, an "if"
value = 0

if value > 0:
    sgn = 1
else:
    sgn = 0
print("in regular if, sgn should be 0 --", sgn)

# now as a conditional expression
sgn = 1 if value > 0 else 0
print("in conditional expression, sgn should be 0 --", sgn)

# now an if .. else if .. else
value = -200

if value > 0:
    sgn = 1
elif value == 0:
    sgn = 0
else:
    sgn = -1
print("in regular if/elif/else, sgn should be -1 --", sgn)

# now as a conditional expression
sgn = 1 if value > 0 else 0 if value == 0 else -1
print("in conditional expression, sgn should be -1 --", sgn)


# and now the recursive factorial function
def rcefact(n):
    return 1 if n == 1 or n == 0 else n * rcefact(n-1)

print("7! =", rcefact(7))
print("10! =", rcefact(10))