SUB 


sub( string, first, [last] )
string the string that you want to convert into a table
first the number of characters from the beginning of the string to start pulling as the substring.

*If not given, the full string is returned.
last (optional) the number of characters from the beginning of the string to stop pulling as the substring. (default: full length of string) 

The sub( string ) function is used to separate a part of a string into a smaller string. The first character of the string is 1. 


For example, if we call sub("hello world"), the function will return a character or string from within the full given string.

string = "hello world"
print( sub(string,1 ) )   --"hello world"
print( sub(string,2 ) )   --"ello world"
print( sub(string,4,8 ) ) --"lo wo"
print( sub(string,7,7 ) ) --"w"

Common Uses


The most common usage of the function sub() is to create a text appearance animation as if it is being typed out one character at a time. Example:

string = "hello world"
first = 1
last = 1


function _draw()
	cls()
	last+=.5	
	print( sub(string,first,last) )
end


Another way to reveal text is to use the clip() function. See the tutorial Text Wipe for a detailed example.

Official Manual - SUB

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23 Nov 2023

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