Type Function Library string.* Return value Numbers Revision Release 2024.3703 Keywords string, find, search, patterns See also string.gmatch() string.gsub() string.match()
Looks for the first match of a pattern in a string. If found, it returns the indices where the occurrence starts and ends; otherwise, returns nil.
string.find( s, pattern [, init [, plain]] )
String. The string.
String. Specifies the pattern to match. See Lua String Manipulation.
Number. Specifies where to start the search. Default value is 1 and can be negative. Negative numbers start at the end of the string.
Boolean. A value of true turns off the pattern matching facilities, so the function does a plain “find substring” operation with no characters in pattern being considered “magic”. If plain is given, then the init argument must be provided as well.
print( string.find( "Hello Corona user", "Corona" ) ) --> 7 12 print( string.find( "Hello Corona user", "Bud" ) ) --> nil print( string.find( "Hello Corona user", "Corona", 1 ) ) --> start at first character: 7 12 print( string.find( "Hello Corona user", "Corona", 8 ) ) --> start at character 8: nil print( string.find( "Hello Corona user", "e", -5 ) ) --> first "e" 5 characters from end: 16 16 print( string.find( "Hello Corona user", "%su", 1, true ) ) --> nil