webinar-for-loops-2023-08-05

# 2023 Aug 5
# WEBINAR: For Loops

# We use loops to repeat actions

# a WHILE loop... is an IF that repeats as long as the loop condition remains True

# FOR LOOPS are used for repeating actions for every element in a container (list, str, tuples, sets, dictionary, range objects)

# Basic syntax of a for loop
# for ___ in _someContainer_:

# list
myList = ["Agent Scully", "Agent Mulder", "Walter Skinner", "CSM", "Mr. X"]
for item in myList:
    print(item) # print(item, end="\n")

# tuple
myTuple = ("Gilligan", "Castaway002", "red", "crew")
for item in myTuple:
    print(item)

# string
myString = "It was the best of times."
for char in myString:
    print(char)

# dictionaries
# { key: value, key:value}
# myDict[key] # retrive the value for that key
# myDict[key] = value # assign a value to that key

# for key in myDict: # loop var holds the keys, regardless of what I call it
bestOfXF = {
    "1x00": "Pilot",
    "2x10": "Red Museum",
    "2x14": "Die Hand Die Verletzt",
    "3x04": "Clyde Bruckman's Final Repose",
    "3x12": "War of the Coprophages",
    "3x20": "Jose Chung's From Outer Space",
    "4x05": "The Field Where I Died",
    "5x05": "The Post Modern Prometheus",
    "5x17": "All Souls"
}
# for key in bestOfXF:
#     # "Check out Episode ___ or '___'"
#     val = bestOfXF[key]
#     print(f"Check out Episode {key} or '{val}'")

# range()... just to repeat a number of times
for num in range(0, 5): # range(start, stop, step) --> [0, 1, 2, 3, 4]
    print(num)

# going over a sequenced container and you need the INDEX
# 2 choices

# range() of len()
# for item in myList:
for i in range(len(myList)):
    # myList[i]
    print(f"{i} - {myList[i]}")

# enumerate()
for i, item in enumerate(myList):
    print(f"{i} --> {item}")