python-Basics-Basics-variables-selection-loops

1 Basic Knowledge 1.1 Classification of annotations

1.2 Variables and types

　　Variable definition

    100 #num1就是一个变量，就好一个小菜篮子    num2 = 87  #num2也是一个变量    result = num1 + num2 #把num1和num2这两个"菜篮子"中的数据进行累加，然后放到 result变量中

Variable Type

　　

Note: How do you know the type of a variable?

• • In Python, as long as a variable is defined, and it has data, then its type is determined, without the developer's initiative to explain its type, the system will automatically identify
  • You can use the type (the name of the variable) to see the type of the variable

1.3 Inputs and outputs

Output

　　Normal output

　　

  # Print prompt    ('helloworld') print    ('  Give me the card---hindi, you mean ')

格式化输出


　　

Input

1.4 Operator and data type conversions

2 selection and Judgment 2.1 selection

2.2 Cycles

python-Basics-Basics-variables-selection-loops