Finds the position of the first occurrence of a character or a string inside another string. By default, searches from the beginning of the String, but can also start from a given index, allowing for the locating of all instances of the character or String.
- myString: a variable of type String.
- val: the value to search for. Allowed data types: char, String.
- from: the index to start the search from.
- The index of val within the String, or -1 if not found.
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