CHR$
| BASIC keyword | |
| Keyword: | CHR$ |
| Abbreviation: | C, Shift+H |
| Type: | Function |
| Token code: | 199/$C7 |
| Handling routine in BASIC ROM: |
46828–46847 $B6EC–B6FF |
| List of all BASIC keywords | |
Remark: This article describes the BASIC function CHR$ in BASIC V2 at the Commodore 64.
Type: String Function General Programming-Syntax: CHR$(<numeric-expression>)
CHR$ can be used to convert a number between 0 and 255 into an ASCII character (of string type) and is the inverse function of ASC.
The argument expression is implicitly taken as integer value. Numbers outside the range - either negative or greater than 255 - leads to the BASIC error ?ILLEGAL QUANTITY ERROR. If an incorrect variable type is used, the BASIC error ?TYPE MISMATCH ERROR appears. In case the numerical argument is missing, the BASIC error ?SYNTAX ERROR is issued.
If you include the converted ASCII code of a control character, its function can be executed by using the BASIC command PRINT.
Examples[edit | edit source]
Control characters:
10 PRINT CHR$(147): REM clear the screen 20 A$="First name"+CHR$(13)+"Surname": REM adding the <RETURN>-key into the string A$. 30 PRINT A$: REM output A$
Special unquoteable characters:
10 INPUT "Name:";N$ 20 REM to get a double quote we need the PETSCII code for (") 30 PRINT "Your name is ";CHR$(34);N$;CHR$(34)
giving output (for input "Peter")
Your name is "Peter"
ABS | AND | ASC | ATN | CHR$ | CLOSE | CLR | CMD | CONT | COS | DATA | DEF | DIM | END | EXP | FN | FOR | FRE | GET | GET# | GOSUB | GOTO | IF | INPUT | INPUT# | INT | LEFT$ | LEN | LET | LIST | LOAD | LOG | MID$ | NEW | NEXT | NOT | ON | OPEN | OR | PEEK | π | POKE | POS | PRINT | PRINT# | READ | REM | RESTORE | RETURN | RIGHT$ | RND | RUN | SAVE | SGN | SIN | SPC | SQR | STATUS/ST | STEP | STOP | STR$ | SYS | TAB | TAN | THEN | TIME/TI | TIME$/TI$ | TO | USR | VAL | VERIFY | WAIT
