Radio Shack CTR-118 User Manual Page 68
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- Table of contents
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5-2
String Input/Output
String constants -sequences of alphanumeric characters - may be input to a
program just as numeric constants are input, using INPUT, READ/DATA,
and INPUT # (input from cassette). They may generally be input without
quotes:
10 INPUT "YES OR NO";R$
20 IF R$="YES"PRINT"THAT'S BEING POSITIVE!": END
30 PRINT "WHY NOT?"
RUN
YES OR NO?_
[you type]
YES
[ENTER]
THAT'S BEING POSITIVE!
READY
>_
However, to input a string constant, which contains commas, colons,
or leading blanks, the string must be enclosed in quotes.
10 INPUT "LAST NAME, FIRST NAME";N$
20 PRINT N$
RUN
LAST NAME, FIRST NAME?_
[you type:]
"SMITH,JOHN"
[ENTER]
SMITH,JOHN
READY
>_
The same rule regarding commas, colons and leading blanks applies to values
input via DATA statements and INPUT # statements.
10 READ T$,N$,D$
20 PRINT T$;N$;D$
30 DATA "TOTAL IS: ","ONE THOUSAND,TWO HUNDRED "
40 DATA DOLLARS.
T$ requires quotes because of the colon;
N$ requires quotes because of the comma.
- LIMITED WARRANTY 2
- One Tandy Center 3
- Fort Worth, Texas 76102 3
- CONTENTS 5
- This Reference Manual and You 7
- Setting up the System 9
- Notes on Using the Recorder 10
- Special Notes: 11
- 1 / General Information 13
- Operating Modes 14
- Special Function Keys 15
- Variable Names 16
- Variable Types 16
- Arithmetic Operators 17
- Relational Operators 18
- String Operators 19
- Order of Operations 19
- Intrinsic Functions 20
- Graphics 20
- Error Messages 20
- Abbreviations 20
- Keyboard Rollover 21
- Glossary for LEVEL II BASIC 22
- 2 / Commands 23
- CLOAD? " 25
- CSAVE"1" 26
- CSAVE"A" 26
- DELETE 5 26
- DELETE 11-18 26
- 3 / Input-Output 31
- @ position, item list 33
- PRINT TAB 33
- (expression) 33
- PRINT USING 34
- PRINT #-1 42
- INPUT #-1 42
- Sample Program 43
- 10 INPUT#-1,A1,B$,L$ 43
- 20 PRINT A1,B$,L$ 43
- 40 GOTO 10 43
- 4 / Program Statements 45
- 10 DEFINT A,I,N 46
- 10 DEFINT I-N 46
- 100 DEFSNG I,W-Z 47
- 10 DEFDBL S-Z, A-E 47
- 10 DEFSTR L-Z 48
- 10 CLEAR 1000 48
- ON ERROR GOTO 57
- Data Conversion 62
- Typing of Constants 62
- Type Conversion 63
- 5 / Strings 67
- String Input/Output 68
- String Comparisons 69
- String Operations 70
- String Space 70
- (string) 71
- (string, n) 74
- STRING$ 76
- Coding/Decoding Program 78
- Instring Subroutine 78
- 6 / Arrays 81
- Other Types of Arrays 84
- 7 / Arithmetic Functions 89
- 100 K%=CINT(X#)+CINT(Y#) 90
- 100 Y=COS(X+3.3) 90
- 100 PRINT CSNG(A#+B#) 90
- 100 PRINT EXP(-X) 91
- 100 Y=ABS(A-FIX(A)) 91
- 100 Z=INT(A*100+.5)/100 91
- 100 PRINT LOG(3.3*X) 91
- 8 / Special Features 95
- ERR /2+1 98
- (address) 100
- CALL 0A7FH 103
- JP 0A9AH 103
- (variable name) 107
- Logical Operators 109
- 20 GOTO 10 111
- 9 / Editing 113
- ENTER key 114
- Space-bar 114
- 100 FOR I=1 TO 10_ 115
- 100 FOR I=_ 115
- L (List Line) 116
- X (Extend Line) 116
- I (Insert) 117
- A (Cancel and Restart) 117
- E (Save Changes and Exit) 117
- Q (Cancel and Exit) 118
- H (Hack and Insert) 118
- D (Delete) 118
- 100 FOR I=1 TO 1_ 119
- 10 / Expansion Interface 121
- Line Printer 122
- LPRINT CHR$(10) 124
- LINE ONE 124
- LINE TWO 124
- LINE THREE 124
- POKE 16424,40 125
- POKE 16425,0 125
- Mini-Disks - (DISK BASIC) 126
- Additions to LEVEL II 126
- Expansion of RAM Memory 127
- 11 / Saving Time and Space 129
- Speeding Up Execution 130
- Appendix 131
- A / Level II Summary 133
- Commands 135
- Input/Output Statements 138
- Program Statements 140
- String Functions 144
- Arithmetic Functions* 145
- Special Functions 146
- LEVEL II Reserved Words* 148
- B / Error Codes 151
- Explanation of Error Messages 152
- Hard-To-Find Errors 153
- C / TRS-80 Character Codes 155
- Decimal/Hexadecimal Codes 156
- Control Codes: 0-31 157
- Graphics Codes: 128-191 158
- Graphic Characters 161
- D / Memory Map 163
- Important Addresses 164
- F / Derived Functions 167
- G / Base Conversions 169
- H / User Programs 173
- Sort Routine 175
- Space-Ship Lander 176
- Customer Information 178
- Target Practice 180
- Using Your Cassette Deck 185
- LEVEL II 187
- Hints and Tips 187
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