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Table of contents
2. Floating point type (float)
1. Python
Python was designed by Guido van Rossum of the Netherlands Research Society for Mathematics and Computer Science in the early 1990s as an alternative to a language called ABC . [1] Python provides efficient high-level data structures and simple and effective object-oriented programming. Python's syntax and dynamic typing, as well as its interpreted nature, make it a programming language for scripting and rapid application development on most platforms,
2. Common data types
1. Integer type (int)
Examples of integer types: 111, 222, 333, 444
2. Floating point type (float)
Examples of floating point types: 1.2, 3.2, 43.2, 432, 55
3. Boolean type (bool)
There are only two Boolean types: TRUE (yes) FALSE (no)
4. String type (str)
There are three types of strings: single quotes, double quotes, triple quotes
Example: 'I am a single quote' "I am a double quote" '''I am a triple quote'''
3. Type conversion
When connecting str type with int type, error solution, type conversion
1. Conversion rules
str() Function: Convert other data types into strings. Note: You can also use quotation marks to convert,
举例
str（）
‘123’int () function: convert other data types into integers. Notes: 1. Text type and decimal strings cannot be converted into integers. 2. Floating point numbers are converted into integers, and rounded up.
举例
int（‘123
int（9.8）float() function: convert other data types to floating-point numbers. Note: 1. Text cannot be converted into integers. 2. Integers can be converted into floating-point numbers with 0 at the end.
举例
float('9.9')
float(9)4. Overall example
si='128'
f1=98.7
s2='76.77'
ff=true
s3='hello'
print(type(s1),type(f1),type(s2),type(ff),pyte(s3))
print(int(s1),type(int(s1)))
print(int (f1),type(int(f1)))
print(int(ff)),type(int(int(ff)))
analyze
#Convert the int type to the str type through the str() function
#Convert str to int type, the string is a numeric string
#float is converted to int type, the integer part is intercepted, and the decimal part is discarded
#Convert str to int type, report an error, because the string is a decimal string
#When converting str to int type, the string must be a numeric string (integer), non-numeric strings are not allowed to convert
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