webinar-for-loops-2022-12-03

# 2022 Dec 3

# WEBINAR: For Loops

# We use loops to repeat actions

# a WHILE loop... btw.. is basically an IF statement
# that repeats as long as its condition is true

# FOR LOOPS are used for repeating actions for every element
# in a container like a list, string, tuple, etc...

# Basic syntax of a for loop
# for _something_ in _someContainer__:

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

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

# strings
myString = "It was the best of times. \nIt was the\t worst of times."
for char in myString:
    print(char, end="") # print(end="\n")
print()
# test to see if you have a clean new line
# print("A clean new line.")

# dictionaries
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"
}
# myDict[key] # retrieve the value for that key
# myDict[key] = value # assign a value to that key

for key in bestOfXF: # for key in nameOfDict:
    # print: Check out Episode KEY or 'VALUE'
    value = bestOfXF[key]
    print("Check out Episode {} or '{}'".format(key, value))

# range()
for num in range(0, 5): # [0, 1, 2, 3, 4]
    print(num)

# range() of len()
for i in range(len(myList)):
    print("{} - {}".format(i, myList[i]))

# while loops
# any variables needed in the loop condition must be created outside (they're not tied to the loop itself like a for loop var is)
# x = int(input()) # 0
# # if x < 3:
# #     print(x)
# while x < 3: # has a condition, just like an if statement
#     print(x)
#     x += 1 # the loop variable (or something in the loop condition) must change with each iteration

# nested loops
for n in range(3):
    for m in range(4): # entire inner loop iterates for every one interation of outer loop
        print(f"{n}-{m}")