A detailed introduction to len () functions

This article briefly introduces the use of len () functions in Python, including the use of small examples in four cases, which is the basic knowledge in Python learning, if you need a friend, you can refer to the following function: len () 1: Function: return string, list, dictionary, tuples, etc. length 2: syntax: len (str) 3: parameter: str: string, list, dictionary, and tuples to be calculated 4: return value: length of elements such as string, list, dictionary, and tuples 5: instance 5.1, length of calculated string: & amp; gt; & amp; nbsp ;... this article briefly introduces the use of len () functions in Python, including the use of small examples in four cases, which is the basic knowledge in Python learning, if you need a friend, you can refer to the following function: len () 1: Function: return string, list, dictionary, tuples, etc. length 2: syntax: len (str) 3: parameter: str: string, list, dictionary, and tuples to be calculated 4: return value: length of elements such as string, list, dictionary, and tuples 5: instance 5.1, length of calculated string: >>> s = "hello good boy doiido" >>> len (s) 215.2. number of elements in the computing list: >>> l = ['H', 'e ', 'L', 'L', 'O']

1. summarize the use cases of len () functions in Python.

Introduction: strlen () PHP strlen () function definition and usage strlen () function returns the length of a string. Syntax strlen (string) parameter: string description: required. Specifies the string to be checked. The code is as follows...

9. varchar php determines that the input cannot exceed the length range of the mysql varchar field

Introduction: varchar php determines that the input length cannot exceed the length range of the mysql varchar field. However, if the input is UTF-8 encoded, one Chinese character occupies three characters, for example, string $ str = "Hello !! "; If you use the strlen function to judge that the length is 11, which is more than the length of varchar, but it is actually not like this. if you directly execute the insert statement in phpmyadmin, this string can be inserted! For a database, the length is 5. how can we use PHP to get the length? Use the iconv_strlen () function! Echo iconv

10. 10 simple PHP string processing methods for String Arrays

Brief introduction: string array PHP string processing 10 simple methods: 1. determining the length of a string is the most obvious example in this article. The question here is how to determine the length of a string. the strlen () function is not mentioned here: the code is as follows: $ text = "sunny day"; $ count = strlen ($ text); // $ count = 9 2. to intercept a text, create a news abstract. a website usually intercepts about 200 characters and adds a ellipsis at the end of the section to form a Abstract.

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