2.9.2 String Functions

Examples with var str="hello, world" executed;

Function	Description	Example of usage	Result
bin(a)	Returns the string of number a in binary representation	bin(0b0010)	"10"
chr(a)	Returns the character with a of the ASCII code in string type	chr(65)	"A"
double(s)	Returns the real number type value of the real number string s (Interpret only up to the position where interpretation is possible, and discard the rest.)	double("29.38E-2")	0.2938
hex(a)	Returns the string of number a in hexadecimal representation	hex(0x7A2F)	"7A2F"
int(s)	Returns the integer type value of the integer string s (Interpret only up to the position where interpretation is possible, and discard the rest.)	int("13.25") int("29.38E-2")	13 29
left(s, n)	Returns a string of the first n characters of the string s	left(str, 3)	"hel"
len(s)	Returns the length of the string if s is a string and returns the number of elements in the array if s is an array	len("HELLO") len([20, 30, 80])	5 3
mid(s, i, n)	Returns a string of n characters starting from the i-th character of the string s (The position of the first character is 0.)	mid(str, 3, 5)	"lo, w"
mirror(s)	Returns the string inverted from the string s	mirror("HELLO")	"OLLEH"
right(s, n)	Returns a string of the last n characters of the string s	right(str, 3)	"rld"
str(a)	Returns a string of number a in decimal representation	str(13.25)	13.250000
strops(s, p)	Returns the first position in the string s that matches the string p (The first character position will be 0 or -1 if there is none.)	strpos(str, "llo") strpos(str, "hi")	2 -1