String Reference in Python
What’s String in Computer?
- The string is traditionally a sequence of characters, either as a literal constant or as some quite variable. The latter may allow its elements to be mutated and therefore the length changed, or it’s going to be fixed (after creation). A string is usually considered as a knowledge type and is usually implemented as an array arrangement of bytes (or words) that stores a sequence of elements, typically characters, using some character encoding. String can also denote more general arrays or other sequence (or list) data types and structures.
- According to programing language and precise data type used, a variable declared to be a string may either cause storage in memory to be statically allocated for a predetermined maximum length or employ dynamic allocation to permit it to carry a variable number of elements.
- In python,there are tons of belongings you can do with strings.Following are the foremost common string operations and string methods
- len(string)Returns the length of the string
- For character in string Iterates pver each character within the string
- If substring in string Checks whether the substring is a component of the string
- string i Accesses the character at index i of the string,starting at zero
- string i:j Accesses the substring at index i,ending at index j-1.If i is omitted,its 0 by default.If j is omitted,its lens(string) by default.
string.lower()/string.upper()Returns a replica of the string with all lower/upper case characters
string.Istrip()/string.rstrip()/string.strip()Returns a replica of the string without left/right/left or right whitespace
string.count(substring)Returns the amount of times substring is present within the string
string.isnumeric()Returns true if there are only numeric characters within the string.If not,returns False.
string.isalpha()Returns True if there are only alphabetic characters within the string.If not,returns False.
String.split()/string.split(delimiter) Returns an inventory of substrings that were separated by whitespace / delimiter.
String.replace(old,new) Returns a replacement string where all occurrences of old are replaced by new.
r.join(list of strings) Returns a replacement string with all the strings joined by the delimiter.