﻿ Math Block # 數學指令Math Block

This block performs simple arithmetic operations like addition, subtraction, multiplication, and division. The input numbers can be typed in or supplied dynamically by data wires. 1. 當數學指令放在工作區上時,會自動打開兩個輸入埠和三個輸出埠.輸入埠的數字可以來自鍵盤或是資料線動態提供.
A Math block dropped into the work area will have an open data hub with two input plugs (on the left) and three output plugs (on the right). The input numbers for the arithmetic equation can be typed in or supplied dynamically by data wires.

計算的結果會從最下方的輸出埠送出.而其他兩個輸出埠會傳遞出相對應的輸入值.如果需要可以用來傳遞輸入的數字到其他指令.(參考下方的資料集線器說明).
Output from the equation will be delivered from the bottommost output plug; connect this plug using a data wire to another block’s data hub. The two output plugs opposite the input plugs allow you to pass the input numbers on to other blocks if this is necessary. (See the Data Hubs section below for more information.) 1. 輸入的數字可以由鍵盤輸入或是由資料線動態提供,如果有資料線連接上就會變成灰色的狀態.
Input values can be typed in or supplied dynamically by data wires. The input boxes will be grayed out when data wires are connected.
2. 四種幾何運算方式:The pull-down menu will let you choose from four arithmetic operations you can perform:
• 減法 Subtraction (-)
• 乘法 Multiplication (x)
• 除法 Division (/)

In this case, the two input numbers will be added together with the sum sent to the output.

Input A + Input B = Output

### 減法 Subtraction

In this case, the second input number will be subtracted from your first number with the difference sent to the output.

Input A - Input B = Output

### 乘法 Multiplication

In this case, the two input numbers will multiplied together with the total sent to the output.

Input A x Input B = Output

### 除法 Division

In this case, the first input number will be divided by the second input number with the quotient sent to the output.

Input A / Input B = Output

## 設定數學指令的資料集線器Configuring the Math block’s Data Hub

You can control the Math block dynamically by connecting data wires (from other blocks’ data hubs) to the Math block’s data hub.

Open a block’s data hub by clicking the tab at the lower left edge of the block after it has been placed on the work area. Data wires carrying input information to a block are connected to the plugs on the left side of its data hub. Data wires carrying output information are connected to the plugs on the right side. [A]輸入連接埠 [A] Input plug
[B]輸出連結部 [B] Output plug
[C]數字資料線(黃) [C] Number data wire (yellow)
[D]邏輯資料線(綠) [D]Logic data wire (green)
[E]文字資料線(橘) [E]Text data wire (orange)
[F]無效資料線(灰) [F]Broken data wire (gray)

### 資料由輸入端傳至傳出端Passing from the input plug to the output plug

If an input plug has a corresponding output plug (see A above), the input data will pass through from the input plug to the output plug without being changed. In this case, you can only use the output plug if the input plug is connected to an input data wire; connecting an output data wire to such an output plug without a connected input data wire will cause the output data wire to be “broken” (and colored gray).

### 特定的資料型態Data wire colors carry specific types of data

Each data wire carries a specific type of data between blocks. For example, if a data wire is dragged from a logic plug on a block’s data hub, it can only be connected to a logic plug on another block’s data hub. The chart below shows what kind of data each plug can accept or send out.

### 資料線顏色Data wire colors

Data wires are identified with specific colors: wires carrying number data are colored yellow, wires carrying logic data are colored green, and wires carrying text data are colored orange.

### 無效的資料線“Broken” data wires

If you try to connect a data wire to a plug of the wrong data type, the data wire will be broken (and colored gray). You will not be able to download your program if a data wire is broken.

If you click a broken wire you can read why it is broken in the small help window in the lower right corner of the work area.

### 資料必須在連接埠的限制範圍內Data must bewithin the possible range of the plug

If an input data wire transmits a value outside the possible range of the plug it is connected to, the block will either ignore the value or change it to a value within its range. For plugs that allow just a few input values (example: just 0, 1, or 2), the plug will ignore the input if a value arrives outside its range.

For plugs that accept larger input ranges (example: 0 – 100), the plug will force any input outside its range to fit. For example, if a Move block’s Power plug receives an input value of 150, the block will change the input value to 100 (i.e., a number within the Power plug’s range).

### his chart shows the different characteristics of the plugs on the Math block’s data hub:

 連結埠Plug 資料型態Date Type 資料範圍Possible Range 資料意義What the Values Mean 連接埠例外說明This Plug is Ignored When... A 數字Number -2147483648 - 2147483647 左邊運算元Left operand B 數字Number -2147483648 - 2147483647 右邊運算元Right operand 結果Result 數字Number -2147483648 - 2147483647 計算結果Result of operation