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參數(shù)資料
| 型號(hào)： | NSB8 |
| 廠(chǎng)商： | Electronic Theatre Controls, Inc. |
| 英文描述： | BASIC interpreter for Z80 family |
| 中文描述： | Z80的BASIC解釋為家庭 |
| 文件頁(yè)數(shù)： | 90/158頁(yè) |
| 文件大?。?/td> | 752K |
| 代理商： | NSB8 |
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grifo
ITALIAN TECHNOLOGY
Page 78
NSB8 Rel. 5.10
USING STRINGS
A string is a sequence of letters and/or other characters. For example, the following are strings:
HELLO
THE DATE IS 7/7/78
NG;34*
ABC123
STRING CONSTANTS
Strings enclosed in quotation marks are called string constants. Note that the quotation marks
themselves are not part of the string, but serve only to mark its boundaries for convenient recognition
by both human beings and machines. The following are examples of BASIC string constants:
“HELLO” “NG;34*” “ABC123”
“THE DATE IS 7/7/78”
THE NULL STRING
The string represented by two consecutive quotes (“ “) contains no characters, and is called the null
string.
STRING VARIABLES
Just as numbers may be held in numeric variables, so can strings be held in string variables. String
variables are named similarly to numeric variables, and differ only in that a dollar sign ($) is added
to the name to denote the type of the variable as string. Thus, a legal string variable name consists
of a single capital letter (A-Z) followed by a dollar sign, or a capital letter and a single digit (0-9),
followed by a dollar sign.
Examples of legal string variable names:
A$
Q7$
Z3$
R$
DIMENSIONING STRING VARIABLES
Before they can be used to hold string values in a program, string variables must be
dimensioned. Dimensioning a string causes BASIC to reserve memory space to hold the value of a
string. To dimension a string, the string name must be included in a DIM statement, along with its
maximum length in characters, before it is used to store a string value in a program (for the proper
method of doing this, see statement DIM). If you use a string variable without having first declared
it in a DIM statement, BASIC will automatically dimension it to a maximum length of 10
characters. Once created, strings may not be redimensioned in a program.
A string variable may contain any string whose length is less than or equal to the dimension of the
string. The current length of the variable is the length, in characters, of the string value it
contains. Thus, if A$ is dimensioned to a maximum length of 26 characters, it may hold the entire
alphabet (current length = 26 characters), the string “CAT” (current length = 3), or even the null string
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PDF描述 |
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| NSB9435T1 | High Current Bias Resistor Transistors(高強(qiáng)度電流偏置電阻晶體管) |
| NSBA114EDXV6T1 | Dual Bias Resistor Transistors(雙偏置電阻晶體管) |
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| NSB8AT | 制造商:VISHAY 制造商全稱(chēng):Vishay Siliconix 功能描述:Glass Passivated General Purpose Plastic Rectifier |
| NSB8AT/31 | 功能描述:整流器 50 Volt 8.0 Amp 125 Amp IFSM RoHS:否 制造商:Vishay Semiconductors 產(chǎn)品:Standard Recovery Rectifiers 配置: 反向電壓:100 V 正向電壓下降: 恢復(fù)時(shí)間:1.2 us 正向連續(xù)電流:2 A 最大浪涌電流:35 A 反向電流 IR:5 uA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DO-221AC 封裝:Reel |
| NSB8AT/45 | 功能描述:整流器 50 Volt 8.0 Amp 125 Amp IFSM RoHS:否 制造商:Vishay Semiconductors 產(chǎn)品:Standard Recovery Rectifiers 配置: 反向電壓:100 V 正向電壓下降: 恢復(fù)時(shí)間:1.2 us 正向連續(xù)電流:2 A 最大浪涌電流:35 A 反向電流 IR:5 uA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DO-221AC 封裝:Reel |
| NSB8AT/81 | 功能描述:二極管 - 通用，功率，開(kāi)關(guān) 50 Volt 8.0 Amp 125 Amp IFSM RoHS:否 制造商:STMicroelectronics 產(chǎn)品:Switching Diodes 峰值反向電壓:600 V 正向連續(xù)電流:200 A 最大浪涌電流:800 A 配置: 恢復(fù)時(shí)間:2000 ns 正向電壓下降:1.25 V 最大反向漏泄電流:300 uA 最大功率耗散: 工作溫度范圍: 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:ISOTOP 封裝:Tube |
| NSB8AT-E3/31 | 功能描述:整流器 50 Volt 8.0 Amp 125 Amp IFSM RoHS:否 制造商:Vishay Semiconductors 產(chǎn)品:Standard Recovery Rectifiers 配置: 反向電壓:100 V 正向電壓下降: 恢復(fù)時(shí)間:1.2 us 正向連續(xù)電流:2 A 最大浪涌電流:35 A 反向電流 IR:5 uA 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:DO-221AC 封裝:Reel |
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