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=String=
Input a sequence of characters. Used to assign text to a String value type or as an input parameter that accepts String objects.


Read more here: https://www.arduino.cc/en/Reference/String , https://www.arduino.cc/en/Reference/StringObject

=Character=
Input a character. Used to assign a character to a Char value type or as an input parameter that accepts Char objects.


Read more here: https://www.arduino.cc/en/Reference/Char

=String Combination (Concatenation)=
Appends the '''second input''' to the end of the '''first input'''. Then returns the resulting String. Inputs can either be user input (direct characters) or variables that are the String data type.


Example: ['''"abc"''' join '''"def"'''] will return '''"acbdef"'''


Read more here: https://www.arduino.cc/en/Tutorial/StringAdditionOperator

=String to Number Datatype=
Converts the String input (user input or String variable) into a numeric data type (Integer or Float) and returns it.
*toInt - Converts the input String into an Integer (int) data type.
*toFloat - Converts the input String into a Float (float) data type.


Example 1: [toInt '''"7.11"'''] returns 7 of int data type.

Example 2: [toFloat '''"7.11"'''] returns 7.11 of float data type

'''Note:''' Did you know that in the examples above that '''"7.11"''' is of data type String? Which is just a sequence of characters( '''7''', '''.''', '''1''', '''1''').


Read more here: https://www.arduino.cc/en/Reference/StringToInt , https://www.arduino.cc/en/Tutorial/StringToIntExample , https://www.arduino.cc/en/Reference/StringToFloat , https://www.arduino.cc/en/Tutorial/StringToFloatExample

=Numberic Datatype to String=
Converts the input number to a String and returns it. Input can be a user value or in a numeric data type (int, float, double) variable.


Read more here: https://www.arduino.cc/en/Reference/StringConstructor

=String Length=
Returns the length (number of characters) of the input String. Input can either be a direct user String or a variable that is a String.


Example 1: [length of "hello"] will return 5.

Example 2: '''var''' is a String variable that contains "6chars". [length of '''var'''] will return 6.


Read more here: https://www.arduino.cc/en/Reference/StringLength

=Character Access in String=
Return the Character in the String at the Index number. 
Each String object starts at index 0. Therefore, the first Character of a String is indexed at 0. If a String is of length 10. The last index is 9.

*Input String - User input string or a variable of String type. This is the String that the block will look accessible the Character at '''Index Number''' from.
*Index Number - The index number that this block will return the Character from the '''Input String'''.


Example: If the String is '''"Hello!"'''. The Characters and their Indexing is shown below. The size of the String is 6.

{| class="wikitable"
|-
! Index
| 0
| 1
| 2
| 3
| 4
| 5
|-
! Character
| H
| e
| l
| l
| o
| !
|}

*To access the first character '''H''' would be ['''"Hello!"''' char at '''0'''].
*To access the character '''e''' would be ['''"Hello!"''' char at '''1'''].
*To access the character '''o''' would be ['''"Hello!"''' char at '''4'''].
*To access the last character '''!''' would be ['''"Hello!"''' char at '''5''']. '''Note:''' 5 = 6 (size of the String) - 1


Read more here: https://www.arduino.cc/en/Reference/StringCharAt

=String Content Comparison=
There are several operations for comparisons between two Strings. Inputs can either be user String inputs or a String data type variable. If the statement is correct a boolean '''true''' is returned. If incorrect a boolean '''false''' is returned.

==Equals==
equals - Checks if the two input Strings are equals. That is, the two Strings are exactly identical. 

*Example 1: ['''"abcdef"''' equals '''"abcdef"'''] returns '''true'''
*Example 2: ['''"abcdef"''' equals '''"abcde"'''] returns '''false'''
*Example 3: ['''"abcdef"''' equals '''"bcdef"'''] returns '''false'''

Read more here: https://www.arduino.cc/en/Reference/StringEquals

==Starts With==
startsWith - Checks if the first input String (left) starts with the second input String (right).

*Example 1: ['''"abcdef"''' startsWith '''"abcdef"'''] returns '''true'''
*Example 2: ['''"abcdef"''' startsWith '''"abcde"'''] returns '''true'''
*Example 3: ['''"abcdef"''' startsWith '''"bcdef"'''] returns '''false'''

Read more here: https://www.arduino.cc/en/Reference/StringStartsWith

==Ends With==
endsWith - Checks if the first input String (left) ends with the second input String (right).

*Example 1: ['''"abcdef"''' endsWith '''"abcdef"'''] returns '''true'''
*Example 2: ['''"abcdef"''' endsWith '''"abcde"'''] returns '''false'''
*Example 3: ['''"abcdef"''' endsWith '''"bcdef"'''] returns '''true'''


Read more here: https://www.arduino.cc/en/Reference/StringEndsWith

=String Length Comparison=