#The only form of nesting we've encountered so far was an if statement within a loop.

languages = ["Python", "C++", "Java", "Perl", "C#"]

for language in languages:

if language == "C#":

print(language + " found")

break

#proper nesting is vital inside of python. Unlike many other languages,

#python is indentation sensitive. The position of the code is important

for language in languages:

if language == "C#":

print(language + " found")

break

#^^ This loop does something completely different.

#Syntactically, the only difference is the position of the break keyword.

#It will break at the end of the first iteration no matter what

########## NESTED IF ##########

logging = True

logging_in = True

name = "Caleb"

if logging_in:

if logging:

print(name + " is logging in.") #log console, file, or db.

print("Welcome, " + name)

########## CONVERTING COMPLEX CONDITIONAL TO NESTED IF ###########

#It is common in more complex code to see nested if statements

#This can often replace complex expressions that use numerous logical operators

#Either way is not better, just whatever is clearer to you

age = 20

fun = False

likes_to_dance = True

if (age < 30 or fun) and likes_to_dance:

print("You're invited to the party!")

else:

print("get lost freakbag") #most general

#This could alternatively be represented with nested if statements

#and can allow more specific responses

if age < 30 or fun:

if likes_to_dance:

print("You're invited to the party!")

else:

print("How could you not like to dance?") #Specific to dancing

else:

print("You're either too old or not fun enough to be in my party")

#Note how we can't easily say which. We say OR.

########## INTRO TO NESTED FOR ##########

#If you are fairly new, nested loops can be confusing. Pay attention!

#Stop texting and looking at memes...CODE!

#We can loop a loop using a nested loop.

#The inner loop will run each iteration of the outer loop.

for i in range(4):

for j in range(5):

print(j, end=" ")

print() #go to next line

#The result? The inner loop prints 0 - 4. We then do this 4 times

#After each complete 0-4 print, we go to the next line with print()

#This puts the next loop on the next line of output