Why Python?

Python can be used for...

# Prints whole numbers and decimal numbers
print(10)
print(2.5)

• If you want to write the number 10 on the screen all you need to do is use the print command.
• All you need to do is type: print(10),
• That's it, that easy.
• The print() function is the standard way to send data to the screen in Python.
• Sending data to the screen is called standard output.
• Passing the number 10 without quotes tells Python to process it as a number instead of text.
• Passing 2.5 demonstrates Python's ability to handle decimal numbers automatically.
• Python internally converts numerical values into a text format so they can be displayed visually.
• Every print() call automatically adds a line break, which is why your results appear on two separate lines.
• You can print multiple items at once by separating them with commas, such as print(10, 2.5).

# Prints text
print("Hello, how are you!")
print("Welcome to Python!")

• Any text can displayed, just like a text message.
• Text requires that you start with double quotes " and end with double quotes ".
• Text can also start with a single quote ' and end with a single quote '.
• What if I want to display a single quote ' or a double quote " ?.

# Prints words and sentences
print("I want to display a '")
print('Now I want to display a "')
print("I want to display single quotes 'testing'")
print('Now I want to display double quotes "testing"')

• To display a single quote ' or single quotes surround the text with double quotes "".
• To display a double quote ' or double quotes surround the text with single quotes ''.
• Text can also start with a single quote ' and end with a single quote '.
• What if I want to display a single quote ' or a double quote " ?.

# Display single quotes and double quotes
print("I don't want to go inside")
print()
print('I may want to say "Thank you."')

• Double quotes let you write a sentence that has a single quote inside it, like in the word don't.
• Single quotes let you write a sentence that has double quotes inside it, like when someone says "Thank you."
• print() shows the message on the screen exactly as you type it inside the quotes.
• You can use either single or double quotes in Python, as long as they match at the start and end.

# Display numbers and strings
print(10, 2.5, "Hello")

• You can use print to show whole numbers, decimal numbers, and words on your screen.
• Python is smart enough to know if you are giving it a number or a piece of text.
• When you put several things inside the parentheses, Python will show them all in a row.
• You can also use print on just one thing at a time to show it on its own line.

# Display numbers and strings
print(10,end="")
print(15,end="")
print("Hi")

• print() normally moves to a new line after it shows something.
• When you use end="", it tells Python not to move to a new line.
• This makes the next print() show its output right next to the previous one.
• In this example, the numbers and the word appear together on the same line.

# Display blank lines

print("Hi",end="\n\n")
print("Hello",end="\n\n")
print("Good Morning")
print(10)

• Normally, Python starts a new line right after it finishes printing something.
• Adding end="\n\n" tells Python to push the next bit of text further down the screen.
• It works like pressing the "Enter" key twice on your keyboard to create a bigger gap.
• This is a great way to make your information look neat and spread out so it's easier to read.

# Display blank lines

print("Hi")
print()
print("Hello")
print()
print(15)

• Using three quotes """ lets you write a long message that covers many lines.
• It is like writing a letter or a poem where you want to start a new line whenever you like.
• Python remembers exactly where you hit the "Enter" key and keeps those gaps in your message.
• When you print the message, it looks on the screen exactly how you typed it in your code.

message = """Hello,
This is a multiline
string in Python."""

print(message)

• Triple quotes """ """ let you write text on more than one line.
• You can press Enter inside the triple quotes to create new lines.
• When you use print(), Python shows the text exactly the way it is written.
• This is useful for things like addresses, letters, or lists that need to appear on separate lines.

address = """John Smith
123 Main Street
New York, NY 10001
USA"""

print(address)

• Triple quotes """ """ let you write text on many lines without using lots of print() statements.
• You can press Enter inside the triple quotes to create a neat layout, like a menu.
• When you use print(), Python shows the text exactly how it is written inside the triple quotes.
• This makes it easy to display things like menus, lists, or signs in a clear way.

menu = """Restaurant Menu
-------------
1. Burger
2. Pizza
3. Salad
4. Pasta"""

print(menu)

• Triple quotes """ """ let you write text on many lines without using lots of print() statements.
• You can press Enter inside the triple quotes to create a neat layout, like a menu.
• When you use print(), Python shows the text exactly how it is written inside the triple quotes.
• This makes it easy to display things like menus, lists, or signs in a clear way.