Pad string arg1 to length arg2 using character arg3. arg3 is optional and if omited will default to the ' ' (space) character. If arg2 is negative, the string is padded on the left. If arg2 is positive the string is padded on the right.e.g. STRPAD("fred", 10, "*") will return the string "fred******" STRPAD("fred", 10) will return the string "fred " STRPAD("fred", -10, "*") will return the string "******fred" STRPAD("fred", -10) will return the string " fred"