id/email
password
forgot password | create account
about | help | code help+videos | done | prefs
CodingBat code practice

 

doubleLetters


Returns a String that has the alphabet characters in the String argument doubled.


doubleLetters("ant!") → "aanntt!"
doubleLetters("+a+") → "+aa+"
doubleLetters("") → ""

...Save, Compile, Run (ctrl-enter)

public String doubleLetters(String s){ }

Editor font size %:
Shorter output


Forget It! -- delete my code for this problem

Progress graphs:
 Your progress graph for this problem
 Random user progress graph for this problem
 Random Epic Progress Graph

Java Help

Misc Code Practice

Copyright Nick Parlante 2017 - privacy