Himem; If - AMSTRAD cpc 6128 User Instruction

HIMEM
HIMEM
PRINT HIMEM
42619
FUN CTI 0 N: Returns the address of the HIghest byte of M E M ory used by BASIC,
(which may be altered by the MEMO RY command).
NOTE - BASIC uses only the first 64K of the memory.
Associated keywords: F RE, M E M 0 R Y, S Y M B 0 L, S Y M B 0 L AFT E R
IF
I F <logical expression> THE N <option part> [E LSE <option part>]
10 MODE 1
20 x=CINT(RND*100)
30 PRINT "Guess my number (0 to 100)"
40 INPUT n
50 IF ,n<x THEN PRINT n;"is too low.,,"
60 IF n>x THEN PRINT n;"istoo high .. ,"
70 IF n=x THEN 80 ELSE c=c+1:GOTO 40
80 PRINT "Well done, you got it in";
90 PRINT c+1;"guesses!"
run
COMMAND: Determines whether the <logical expression> is true, in which case the
first <option part> is executed. If the <logical expression> is false, any <option part>
specified in the EL SE clause is executed, otherwise BASIC passes onto the next line.
I F THE N commands may be nested to any depth, and are terminated by end ofline.
Therefore it is NOT possible to have further statements which are independent of the
I F THE N command, on the same line.
Where the result of the <logical expression> requires that a line should be jumped to,
the command may be given as either:
Examples ....
IF .a = 1 THE N 1 00
.... or ....
IF a=1 GOTO 100
.... or ....
IF a=1 THEN GOTO 100
Associated keywords: EL SE, GOT 0, THE N
Chapter 3 Page 32 Complete List of Keywords