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STRLEN()
Syntax:
strlen!(<string pointer>)
The STRLEN() function returns the length of a string. The function accepts a string pointer (a literal string, a string pointer or a string pointer expression) as its single argument and returns a byte.
Example:
a$ = "xc=basic"
print strlen!(a$)
rem -- outputs: 8
print strlen!("hello world")
rem --outputs: 11