Flow Control

Controlling your application with these techniques enable full control of how your application behaves.  They flex the power of conditional operators.

 

if.. elif.. else..

this = true
that = false

if this == true:
  print('this is true')
elif that == true:
  print('that is true')
else:
  print('neither this or that is true, how did that happen?')

 

for

# The range() function creates a list of numbers based on the parameter given
# The 'for' iterates through that list and stores the current item in x

# the first simple example will print the numbers 0-10
# the second one shows how to terminate a loop early based on a condition
# the last example does the same as the first two but using a pre-defined list

for x in range(10):
  print(x)
  
for x in range(100):
  if x > 10:
    break
  else:
    print(x)
    
listOfThings = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
for x in listOfThings:
  print(x)

 

while

# This example loops while a condition evaluates to true

x = 0

while x <= 10:
  print(x)
  x++

match

# This is similar to a long list of if else statements but is easier to read.
# It branches code execution based the evaluation of a variable

x = 2

match x:
  case 1:
    print('x = 1')
  case 2:
    print('x = 2')
  case 3:
    print('x = 3')