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Questions and Answers
¿Cuál es el propósito de una variable en Python?
¿Cuál es el tipo de dato que representa una secuencia de caracteres?
¿Cuál es el operador de exponentiation en Python?
¿Cuál es el tipo de colección que es ordenada e inmutable?
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¿Cuál es el operador de igualdad en Python?
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¿Cuál es el tipo de dato que representa un valor verdadero o falso?
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Study Notes
Variables and Data Types
- In Python, a variable is a name given to a value.
- Variables can store different data types, including:
- Integers (int): whole numbers, e.g. 1, 2, 3
- Floats (float): decimal numbers, e.g. 3.14, -0.5
- Strings (str): sequences of characters, e.g. "hello", 'hello' (note: strings can be enclosed in single or double quotes)
- Boolean (bool): true or false values
- Lists (list): ordered collections of values, e.g. [1, 2, 3], ["a", "b", "c"]
- Tuples (tuple): ordered, immutable collections of values, e.g. (1, 2, 3), ("a", "b", "c")
- Dictionaries (dict): unordered collections of key-value pairs, e.g. {"name": "John", "age": 30}
Operators and Control Structures
- Arithmetic operators:
- Addition: a + b
- Subtraction: a - b
- Multiplication: a * b
- Division: a / b
- Modulus: a % b
- Exponentiation: a ** b
- Comparison operators:
- Equal: a == b
- Not equal: a!= b
- Greater than: a > b
- Less than: a < b
- Greater than or equal to: a >= b
- Less than or equal to: a <= b
- Logical operators:
- And: a and b
- Or: a or b
- Not: not a
- Control structures:
- Conditional statements: if, elif, else
- Loops: for, while
Functions
- Functions are blocks of code that can be called multiple times with different inputs.
- Functions can take arguments, which are values passed to the function when it is called.
- Functions can return values, which can be used by the calling code.
- Functions can be defined with the
defkeyword, e.g.def greet(name): print("Hello, " + name + "!")
Modules and Packages
- Modules are pre-written code libraries that can be imported into a Python script.
- Modules can be imported using the
importstatement, e.g.import math - Packages are collections of modules that can be imported together.
- Packages can be imported using the
importstatement, e.g.import tkinter as tk
Object-Oriented Programming
- Classes define objects and their properties and behaviors.
- Classes can inherit properties and behaviors from parent classes.
- Objects are instances of classes, and can have their own properties and behaviors.
- Objects can be created using the
()operator, e.g.my_object = MyClass()
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Description
Test your knowledge of Python fundamentals, including variables, data types, operators, control structures, functions, modules, and object-oriented programming.
