Locates a character or String within 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.
string.indexOf(val) string.indexOf(val, from)
string: a variable of type String
val: the value to search for - char or String
from: the index to start the search from
The index of val within the String, or -1 if not found.