Day 5 - Conditions & Control Flow

Author: codingforentrepreneurs

tutorial-reference/Day 5/Day 5 - Conditions & Control Flow.md

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+# Day 5 - Conditions & Control Flow
+
+__Reference__
+```
+>>> True
+>>> False
+
+>>> True == False
+
+>>> True != False
+
+>>> 10 > 31
+
+>>> 94 < 123
+
+>>> 133 >= 133
+
+>>> 133 <= 201
+
+>>> "abc" == "ABC".lower()
+
+>>> "XyZ".upper() == "XYZ"
+
+>>> str(True).lower() == "true":
+
+>>> 1 > 10
+
+>>> (3123 / 30) == 32
+
+>>> 24 % 5 == 3
+
+```
+
+
+__Conditions & Conditional Statements__
+```
+>>> True
+True
+>>> False
+False
+>>> if True:
+... print("hi there")
+... 
+hi there
+>>> if False:
+... print("nothing")
+... 
+>>> if not False:
+... print("whats up")
+... 
+whats up
+>>> True == False
+False
+>>> var_ = "this"
+>>> True = False
+ File "<stdin>", line 1
+SyntaxError: cannot assign to True
+>>> for = True
+ File "<stdin>", line 1
+ for = True
+ ^
+SyntaxError: invalid syntax
+>>> 10 > 32
+False
+>>> 424 < 323433
+True
+>>> 10 > 32 or 10 < 32
+True
+>>> not 10 > 32
+True
+>>> not (10 > 32)
+True
+>>> 200 > 200
+False
+>>> 200 >= 200
+True
+>>> 200 > 200 or 200 == 200
+True
+>>> true, false
+Traceback (most recent call last):
+ File "<stdin>", line 1, in <module>
+NameError: name 'true' is not defined
+>>> true
+Traceback (most recent call last):
+ File "<stdin>", line 1, in <module>
+NameError: name 'true' is not defined
+>>> str(True).lower() == "true"
+True
+>>> str("true").title() == "True"
+True
+>>> str("true")
+'true'
+>>> "abc".title()
+'Abc'
+>>> bool(str("true").title())
+True
+>>> abc = [1,2,3,4,5]
+>>> abc_sq = []
+>>> for num in abc:
+... new_number = num ** 2
+... abc_sq.append(new_number)
+... 
+>>> abc_sq
+[1, 4, 9, 16, 25]
+>>> is_even = []
+>>> is_odd = []
+>>> for num in abc_sq:
+... if num % 2 == 0:
+... print("this is even") 
+... is_even.append(num)
+... else:
+... is_odd.append(num)
+... 
+this is even
+this is even
+>>> print(is_even, is_odd)
+[4, 16] [1, 9, 25]
+>>> is_factor_of_3 = []
+>>> for num in abc_sq:
+... if num % 3 == 0:
+... is_factor_of_3.append(num)
+... elif num % 2 == 0:
+... is_even.append(num)
+... else:
+... is_odd.append(num)
+... 
+>>> print(is_factor_of_3)
+[9]
+>>> print(is_even, is_odd)
+[4, 16, 4, 16] [1, 9, 25, 1, 25]
+>>> is_even = []
+>>> is_odd = []
+>>> is_factor_of_3 = []
+>>> for num in abc_sq:
+... if num % 3 == 0: 
+... is_factor_of_3.append(num)
+... else:
+... if num % 2 == 0:
+... is_even.append(num)
+... else:
+... is_odd.append(num)
+... 
+>>> print(is_even, is_odd)
+[4, 16] [1, 25]
+>>> print(is_factor_of_3)
+[9]
+>>> for num in abc_sq:
+... if num % 3 == 0:
+... is_factor_of_3.append(num)
+... if num % 2 == 0:
+... is_even.append(num)
+... is_odd.append(num)
+... 
+>>> print(is_even, is_odd)
+[4, 16, 4, 16] [1, 25, 1, 4, 9, 16, 25]
+```
+
+
+__While Loops & Control Flow__
+```
+🕹 % python3 
+Python 3.8.2 (v3.8.2:7b3ab5921f, Feb 24 2020, 17:52:18) 
+[Clang 6.0 (clang-600.0.57)] on darwin
+Type "help", "copyright", "credits" or "license" for more information.
+>>> x = 10
+>>> i = 0
+>>> while i < x:
+... print(i)
+... i = i + 1
+... 
+0
+1
+2
+3
+4
+5
+6
+7
+8
+9
+>>> while i < x:
+... print(i)
+... 
+>>> i = 0
+>>> while i < x:
+... print(i)
+... 
+0
+0
+
+Traceback (most recent call last):
+ File "<stdin>", line 2, in <module>
+KeyboardInterrupt
+>>> 
+KeyboardInterrupt
+>>> 
+KeyboardInterrupt
+>>> x = 10
+>>> i = 0 
+>>> z = 12
+>>> while i < x:
+... z = z * 2
+... if z > 342900:
+... break
+... print(z, i)
+... i = i + .00000000001
+... 
+24 0
+48 1e-11
+96 2e-11
+192 3e-11
+384 4e-11
+768 4.9999999999999995e-11
+1536 6e-11
+3072 7e-11
+6144 8.000000000000001e-11
+12288 9.000000000000001e-11
+24576 1.0000000000000002e-10
+49152 1.1000000000000002e-10
+98304 1.2000000000000003e-10
+196608 1.3000000000000002e-10
+>>> x = 10
+>>> i = 0
+>>> while i < x:
+... if i % 2 == 0:
+... print("even")
+... else:
+... continue
+... i += 1
+... 
+even
+^CTraceback (most recent call last):
+ File "<stdin>", line 2, in <module>
+KeyboardInterrupt
+>>> 
+KeyboardInterrupt
+>>> while i < x:
+... print(i)
+... if i % 2 == 0:
+... print("even")
+... else:
+... continue
+... i = i + 1
+... 
+1
+1
+1
+Traceback (most recent call last):
+ File "<stdin>", line 2, in <module>
+KeyboardInterrupt
+>>> 
+KeyboardInterrupt
+>>> 
+KeyboardInterrupt
+>>> 
+>>> 
+>>> 
+>>> x = 10
+>>> i = 0
+>>> while i < x:
+... if i % 2 == 0:
+... continue
+... else:
+... print('odd')
+... i += 1
+... 
+^CTraceback (most recent call last):
+ File "<stdin>", line 1, in <module>
+KeyboardInterrupt
+>>> 
+KeyboardInterrupt
+>>> while i < x:
+... i += 1
+... if i % 2 == 0:
+... continue
+... print(i)
+... 
+1
+3
+5
+7
+9
+>>> 
+
+```