What is JavaScript String charAt() and charCodeAt()

first lets see charAt() in javascript

it is simple

• charAt() method returns the character at a specified index in
  a string

• The index of the first character is 0, the second 1, third 3

• The index of the last character is string length - 1
  

now lets see what is charCodeAt() in javascript

• charCodeAt() method returns Unicode of the the character at a
  specified index in a string.

• The index of the first character is 0, the second is 1, third 3

• The index of the last character is string length - 1

• both uppercase and lowercase characters has seperate unicode
  values

Hope your dots connected!!!! : )