Módulo 2

Módulo 2

1. 1. Functions

   • 1. It is a separated part of the code able to:
     • cause some effect
     • evaluate a value and return it as the function’s result
   • 2. Where they come from?
     • built-in
       • They come from python itself, the interpreter provide
     • modules
       • this modules come with Python, or need instalation. But you import both
     • write then yourself
       • you can declare and use your functions
   • 3. Arguments
     • 1. Arguments are data to perform inside the function
     • 2. Positional arguments
       • When the position determines how the function interprets the argument.
     • 3. Keword Arguments
       • The argument is determined by a key.
   • 4. Function invocation (how python works)
     • 1. Chek if the name specified is legal
     • 2. Check if the number of arguments allows you to invoke the functions
     • 3. Python jumps inside the funcion and passes the arguments togeter
     • 4. Python executes the code and causes the desired effect and evaluates the desired results if exists.
     • 5. Python returns tor you code.
   • print()
     • 1. Is a function that receives a string like argument, and display the value legibly to humans
     • 2. end key, is by default end="\n"

2. 2. Literals

   • 1. Is data whose values are determined by the literal itself. Possible choices in the Primitive Types.
   • 2. Integers
     • Integers are devoid of the fractional part.
     • Ex: 1, 1234, -1, -3234
     • Big numbers and the _. 11_222 = 11222
     • Octal Numbers
       • Ex: 0o123
       • Preceded 0o (zero o)
       • Just accepts digits from 0...7
     • Hexadecimal numbers
       • Base 16 = 0...9, A ... F
       • Preceded 0X or 0x (zero x)
       • Ex: 0x123
   • 3. Floats
     • 1. Numbers that have a floating-point.
     • Ex: 2.5, -0.5, 4.0
     • .4 = 0.4, 4. = 4.0
   • 4. Integer vs Floats
     • Python sees 4 and 4.0 in a completely different way. The point makes this a float.
   • 5. Scientifc Notation (E)
     • Representation for Big Numbers
       • Although uses 3x10p8 you can use 3E8 or 3e8 to represents 300000000.0.
     • Representantion of Small Numbers
       • 0.00001 = 1e-07
   • 6. Strings
     • Are used to precess text