10 PRINT " HE LL O" 15 PR I NT '· AQUARIUS " 20 PRINT " PLEASE SO L VE " 30 PRINT " THIS EQ U ATION " 40 PR INT " 2 * 12 = ": 2* 12 In your new program. Line 15 is properly placed between Lines 10 and 20. CLEAR SC REEN (CHR TION (upper left corner of the screen). ~D~ COMPUTER TALK Earlier you learned that you can clear the screen and erase memory by pressing I RST I. then [Bf!i]. What if you want to PRINT CHR$(11) can be used to clear the screen in either Im- mediate or Programmed Mode. In Programmed Mode. type it as you would any numbered stale· ment. When the program is run nnd Aqunrius reaches that state- men t. it will clear the screen and continue tt1e program. COMMAND.
An instruction with- clear the screen WITHOUT eras· ing the memory? Type thiS com- mand : out line numbers used in Immediate Mode. CONCATENATION. The act of joining things together. PR INT CHR$(1 1} or ?CHR$(11) CU RSOR . A pointer (in our case, a black square) that marks the next screen position in which . you can type a character or · space. CHR$ is an example of a com- puter function. Functions are ex- plained later In th e book. Don't worry about understanding this NO TE: The QUESTION MARK is short for PRINT. CTL -(Space key) is the shortcut for CHR$. The space key is marked CHR$ on the overlay. (Of course. you still have to type PRINT or ?
before CHR$ and press I RTN I af t er it .) function now. It's okay to just use it for the time being. EXPONENT IATION. The process of ra is1ng a number to a power. that is, multiplying it by it self a number of times. When you press I RTN I. the sc reen will clear and the cursor will retu rn to th e HOME POS I· HOME POSITION. The upper left corner of the screen. INT EGER . A whole number.