Detailed explanation of the usage of count function in python

Usage of count function in python

count() function

Description: Statistical characters The number of times a certain character appears in a string, you can select the starting position and ending position of the string index.

Syntax: str.count("char", start,end) or str.count("char")

Return value: Integer

Parameter description:

str —— Character to be counted (can be a single character or multiple characters)

star —— Index character The starting position of the string, the default parameter is 0

end - the end position of the index string, the default parameter is the length of the string, that is, len(str)

Program example:

str = "i love python,i am learning python"
print(str.count("i")) #star 和end 为默认参数
print(str.count("i",2)) # star值为2，end值为默认参数
print(str.count("i",2,5)) #star值为2，end值为5
print(str.count("am"))  #多字符统计

Program running results:

3
2
0

Recommended learning: Python tutorial

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