This function returns a decimal string representation of the numeric expr, formatted according to specifications in format$. The characters in format$ are interpreted as follows: If format$ contains any characters other than the specifiers listed above, they are transferred unaltered to the returned string. Example: x! = 14.726 PRINT USING "You owe me $#,###.##."; x! program output: You owe me $14.73.
DEF USING; STR$; UNS$