Tina Majchrzak

import math

greeting = "Hello world!"  # greeting OJBECT is an INSTANCE of the String CLASS
print(greeting)
print(type(greeting))

cnt = greeting.count("l")
print(cnt)

# Our Own Count Function -- We could write it!

def ourCount(phrase, letter):
    ourCnt = 0
    for c in phrase:
        if c == letter:
            # print("found one!")
            ourCnt += 1
    return ourCnt

print(ourCount(greeting, "l"))

x = math.sqrt(64)  # call one of its METHODS
print(x)
print(math.pi)  # reference one of it PROPERTIES

# Knowledge Check #1: identify examples of key concepts