Which string method is used to implement the following:

(i) to count the number of characters in the string.

(ii) to change the first character of the string to uppercase.

(iii) to check whether a given character is a letter or a number.

(iv) to change lowercase letters to uppercase.

(v) change one character to another character.



  1. len(str)  
  2. str.capitalize()  
  3. ch.isalnum()  
  4. str.upper()  
  5. str.replace(old,new)  

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Davneet Singh has done his B.Tech from Indian Institute of Technology, Kanpur. He has been teaching from the past 13 years. He provides courses for Maths, Science, Social Science, Physics, Chemistry, Computer Science at Teachoo.