#   int types
#   int arithmetic operators.
a = 20
b = 3
print(f"a: {a}")
print(f"b: {b}")
print(f"a+b: {a+b}")
print(f"a-b: {a-b}")
print(f"a*b: {a*b}")
print(f"a/b: {a/b}")
print(f"a//b: {a//b}")
print(f"a%b: {a%b}")
print(f"a**b: {a**b}")

c = a/b
print(f"type(a): {type(a)}")
print(f"type(b): {type(b)}")
print(f"type(c): {type(c)}")

#   int assignments.
x = 4
print(f"x: {x}")
x += 2
print(f"after x+= 2; x: {x}")
x -= 3
print(f"after x-= 3; x: {x}")
x *= 6
print(f"after x*= 6; x: {x}")

x %= 4
print(f"after x%=4; x: {x}")

#   Comparisons operators
p = 5
q = 7
print(f"p > q: {p > q}")
print(f"p >= q: {p >= q}")
print(f"p == q: {p == q}")
print(f"p < q: {p < q}")
print(f"p <= q: {p <= q}")

#   bitwise operation.
s = 5 # binary: 0101
t = 3 # binary: 0011
print(f"s: {s}; binary: {s:08b}")
print(f"t: {t}; binary: {t:08b}")
print(f"s & t: {s & t}; binary: {s&t:08b}") # bitwise and
print(f"s | t: {s | t}; binary: {s|t:08b}") # bitwise or
print(f"s ^ t: {s ^ t}; binary: {s^t:08b}") # bitwise exclusive or
print(f"s<<1: {s<<2}; binary: {s<<2:08b}")  # shift left 1 bits.