Python Crash Course init Commit

Author: jimdevops19

01_variables/README.md

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+# Variables
+## Variables helps us to store key&value information that we would like to refer to its value throughout the program
+```python 
+name = "Michael"
+age = 30
+
+print(name, "is my name")
+print(name, "is", age, "years old")
+print(name, "likes to eat pizza")
+print("This man's name is", name)
+
+
+
+```
+## Exercise:
+
+### Is there a way that you can create more than one variable in one line of code ? Worth to search on web if this could be done!
+
+### Answer:
+```python
+a, b, c = 1,2,3 # a will receive 1, b will receive 2, c will receive 3
+#More examples:
+print(a)
+print(b)
+print(c)
+
+name, age = "Jim", 25
+print(name)
+print(age)
+```

01_variables/code.py

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+#Variables
+
+#Variables helps us to store key&value information that we would like to refer to its value throughout the program
+
+
+name = "Michael"
+age = 30
+
+print(name, "is my name")
+print(name, "is", age, "years old")
+print(name, "likes to eat pizza")
+print("This man's name is", name)
+
+

02_types_and_conversions/README.md

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+# Types and Conversions
+## We can divide in any programming language some variable types into categories
+```python 
+#All types:
+name = "John" #Strings - Characters that we want to create/store variables
+age = 30 #Integers - Numbers without decimal point
+temperature = 90.5 #Floating Numbers / Floats  - Numbers with decimal point
+is_raining = False #Booleans - Describes a situation - True or False
+
+#str() - Will convert to string
+#int() - Will convert to integers
+#float() - Will convert to floating numbers
+#bool() - Will convert to booleans
+
+#Temperature average program:
+temperature1 = 95.5
+temperature2 = 94.5
+average = (temperature1 + temperature2) / 2
+print(int(average))
+
+#Concatenate digits program:
+digit_one = 1
+digit_two = 2
+print(str(digit_one) + str(digit_two))
+
+```

02_types_and_conversions/code.py

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+#Types and Conversions
+
+#We can divide in any programming language some variable types into categories
+
+
+#All types:
+name = "John" #Strings - Characters that we want to create/store variables
+age = 30 #Integers - Numbers without decimal point
+temperature = 90.5 #Floating Numbers / Floats  - Numbers with decimal point
+is_raining = False #Booleans - Describes a situation - True or False
+
+#str() - Will convert to string
+#int() - Will convert to integers
+#float() - Will convert to floating numbers
+#bool() - Will convert to booleans
+
+#Temperature average program:
+temperature1 = 95.5
+temperature2 = 94.5
+average = (temperature1 + temperature2) / 2
+print(int(average))
+
+#Concatenate digits program:
+digit_one = 1
+digit_two = 2
+print(str(digit_one) + str(digit_two))

03_input/README.md

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+# Input built in function
+## Input built-in function allows to receive input from the user while the programs runs. Program won't resume till you put your input
+```python 
+#We always want to assign the input built-in function to a variable
+answer = input("How is the weather today")
+print("The weather today is ", answer)
+
+#You can force your inputs to receive specific types of variables:
+current_year = 2021
+answer = int(input("What is your age?")) # We could use any built-in conversion function here we'd like
+print("Your year of birth is", current_year - answer)
+
+
+
+```
+## Exercise:
+
+###  Write a program that will receive three inputs, grade_one, grade_two, grade_three. Try to write a program that will print the average of the received three grades.
+
+### Answer:
+```python
+#We need to force each input to be integers (float would also work)
+grade_one = int(input("What is the first grade?"))
+grade_two = int(input("What is the second grade?"))
+grade_three = int(input("What is the third grade?"))
+
+avg = (grade_one + grade_two + grade_three) / 3
+print("Average is:", avg)
+```

03_input/code.py

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+#Input built in function
+
+#Input built-in function allows to receive input from the user while the programs runs. Program won't resume till you put your input
+
+
+#We always want to assign the input built-in function to a variable
+answer = input("How is the weather today")
+print("The weather today is ", answer)
+
+#You can force your inputs to receive specific types of variables:
+current_year = 2021
+answer = int(input("What is your age?")) # We could use any built-in conversion function here we'd like
+print("Your year of birth is", current_year - answer)
+
+

04_formatted_strings/code.py

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+# Methods
+## Different variable types are going to have their unique methods
+```python 
+#This is the name of our person:
+name = "John doe"
+
+#Say that we want this person to have the name spelled as it supposed to be: John Doe
+#We can launch this method:
+
+print(name.title()) # Will print John Doe
+
+#We might think that once you launch this method on the variable, it will override it for the rest of the program
+
+#BUT:
+#Lets write this program now:
+
+name_two = "John doe"
+name_two.title()
+print(name_two) # This line will STILL show: John doe
+
+#Reason:
+#Not all the methods out there, will affect the value of the variable that you apply the method on.
+
+#To really override the value itself, we can launch this:
+
+name_three = 'John doe'
+name_three = name_three.title()
+print(name_three) # This line will print John Doe
+```

05_methods/README.md

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+#Methods
+
+#Different variable types are going to have their unique methods
+
+
+#This is the name of our person:
+name = "John doe"
+
+#Say that we want this person to have the name spelled as it supposed to be: John Doe
+#We can launch this method:
+
+print(name.title()) # Will print John Doe
+
+#We might think that once you launch this method on the variable, it will override it for the rest of the program
+
+#BUT:
+#Lets write this program now:
+
+name_two = "John doe"
+name_two.title()
+print(name_two) # This line will STILL show: John doe
+
+#Reason:
+#Not all the methods out there, will affect the value of the variable that you apply the method on.
+
+#To really override the value itself, we can launch this:
+
+name_three = 'John doe'
+name_three = name_three.title()
+print(name_three) # This line will print John Doe

05_methods/code.py

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+#String Methods:
+
+#String has its unique methods to display them in different ways
+
+
+#Here are some example you can try to execute:
+
+#.title() - Will capitalize each word on the string
+#.capitalize() - Will capitalize the first letter ONLY
+#.upper() - Will turn all letters in uppercase
+#.lower() - Will turn all lower in uppercase
+name = "John doe"
+print(f"Title: {name.title()}")
+print(f"Capitalize: {name.capitalize()}")
+print(f"Upper: {name.upper()}")
+print(f"Lower: {name.lower()}")
+
+
+###PRACTICE###
+#Q: Is there a way to see how many characters we have inside a string ? Try to search for a way to do so.
+course_name = "JimShapedCoding" # We should find a python built-in function that will automatically count the characters, and give us back 15
+#A:
+#len - A built-in function that will allow us to count the number of characters in a string. We will use the len built-in function as well in more complex variable types that we will learn in the future
+course_name_length = len(course_name)
+print(course_name_length) #Will return 15

06_string_methods/README.md

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+# Math Operators
+## Most of the known arithmetic operations are available to use like in real life math
+```python 
+#type() - A built-in function that will give us back the
+#type of a specific variable
+
+# Addition - 3 + 2
+# Subtraction - 3 + 2
+# Division - 3 / 2 (Will return float)
+# Division without Remainder - 3 // 2
+# Multiply - 3 * 2
+# Power - 3 ** 2
+# Modulus - 3 % 2
+
+
+action = 3 + 2 # Change the operation to what you want to test out
+print(f'Result is: {action}')
+```

06_string_methods/code.py

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+#Math Operators
+
+#Most of the known arithmetic operations are available to use like in real life math
+
+
+#type() - A built-in function that will give us back the
+#type of a specific variable
+
+# Addition - 3 + 2
+# Subtraction - 3 + 2
+# Division - 3 / 2 (Will return float)
+# Division without Remainder - 3 // 2
+# Multiply - 3 * 2
+# Power - 3 ** 2
+# Modulus - 3 % 2
+
+
+action = 3 + 2 # Change the operation to what you want to test out
+print(f'Result is: {action}')

07_math_operations/README.md

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+# Imports
+## There are tons of external libraries in Python that you can use them by calling it's name using the built-in keyword import
+```python 
+import math
+
+#For example, say that we want to perform some more complex
+#Math operations, than we can go and import the math library
+#And use its additional functionalities like that:
+a = 8.2
+b = math.floor(a)
+c = math.ceil(a)
+print(b)
+print(c)
+
+#Remember, there are some more ways that you can import
+#Additional functionalities.
+#You can refer to the specific function that you want to import
+#FROM an external library
+
+from math import ceil
+
+#And then use it like:
+
+d = 8.2
+e = ceil(d)
+print(e)
+
+#But that approach is less common, since the
+#Python will load the entire library anyway.
+#We could think that importing specific function could improve
+#the time run of our program, but this is not the case
+```

07_math_operations/code.py

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+#Imports
+
+#There are tons of external libraries in Python that you can use them by calling it's name using the built-in keyword import
+
+
+import math
+
+#For example, say that we want to perform some more complex
+#Math operations, than we can go and import the math library
+#And use its additional functionalities like that:
+a = 8.2
+b = math.floor(a)
+c = math.ceil(a)
+print(b)
+print(c)
+
+#Remember, there are some more ways that you can import
+#Additional functionalities.
+#You can refer to the specific function that you want to import
+#FROM an external library
+
+from math import ceil
+
+#And then use it like:
+
+d = 8.2
+e = ceil(d)
+print(e)
+
+#But that approach is less common, since the
+#Python will load the entire library anyway.
+#We could think that importing specific function could improve
+#the time run of our program, but this is not the case

08_imports/README.md

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+# Expressions
+## Expressions will allow us to define different situations on our program, that will give us back the value of True or False
+```python 
+#Expressions usually are going to be described with at least one of the following operators
+
+# ==    Equal
+# !=    Not equal
+# >	    Greater than
+# <	    Less than
+# >=    Greater than or equal to
+# <=    Less than or equal to
+
+# There are some more keyworded operators that we will look what they do in the future
+
+print(5 == 5) #True
+print(5 != 5) #False
+print(5 > 5) #False
+print(5 < 5) #False
+print(5 >= 5) #True
+print(5 <= 5) #True
+```

08_imports/code.py

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+#Expressions
+
+#Expressions will allow us to define different situations on our program, that will give us back the value of True or False
+
+
+#Expressions usually are going to be described with at least one of the following operators
+
+# ==    Equal
+# !=    Not equal
+# >	    Greater than
+# <	    Less than
+# >=    Greater than or equal to
+# <=    Less than or equal to
+
+# There are some more keyworded operators that we will look what they do in the future
+
+print(5 == 5) #True
+print(5 != 5) #False
+print(5 > 5) #False
+print(5 < 5) #False
+print(5 >= 5) #True
+print(5 <= 5) #True