Get a substring of a String. The starting index is inclusive (the corresponding character is included in the substring), but the optional ending index is exclusive (the corresponding character is not included in the substring). If the ending index is omitted, the substring continues to the end of the String.
- myString: a variable of type String.
- from: the index to start the substring at.
- to (optional): the index to end the substring before.
- The substring.
The result on Serial Monitor:
※ NOTES AND WARNINGS:
If the string is modified, it is highly recommended using String.reserve() to prevent the memory fragmentation issue