fundamentals of dsl technology

"Value of Var1"$1Echo"Value of Var2"$2Terminal:./bash.sh a 3, the result can be verified2.3 Mathematical calculationsThe shell provides a specialized command expr to calculate mathematical expressions, such as expr 5 +1, but you must also use the inverse when you want to assign the results of the calculation to other variables. var= ' Expr 20/10 '. For example:#!/bin/bash#2.4var1=tenvar2=var3= ' expr $var 2/ $var 1 ' var4= ' expr $var 2 + $var 1 ' echo $var 3echo $var 42.5 Flow Control Statement

is to the filePS =NewPrintStream (NewFileOutputStream (NewFile ("D:" + File.separator + "Test.txt"))) ; String name= "Even my yes";//Defining Strings intAge = 20;//defining integers floatScore = 990.356f;//Defining decimals CharSex = ' M ';//Defining charactersps.printf ("Name:%s; age:%d; score:%f; Gender:%c", Name,age,score,sex); Ps.close (); }};BufferreaderBufferreader reads the contents from the buffer, and all input byte data is placed in the buffer.ImportJava.io.* ;

intKeysadd = 0 ; while((Keysadd=selector.select ()) >0) {//Select a set of keys, and the corresponding channel is readyset//Take out all the generated keysIteratorSelectedkeys.iterator (); while(Iter.hasnext ()) {Selectionkey key= Iter.next ();//Remove each key if(Key.isacceptable ()) {Serversocketchannel Server=(Serversocketchannel) Key.channel (); Socketchannel Client= Server.accept ();//Receive new ConnectionsClient.configureblocking (false) ;//configured as non-block

versioning) information, and so on. SQL Server allows users to create temporary tables for their own use, where the physical location of these temporary tables is tempdb. Note: Each time the SQL Server instance is restarted, the contents of the database are deleted and recreated as a copy of the model. Therefore, When you need to create objects for testing purposes, and you do not want to keep them in the database after testing is complete, you can usually create them in tempdb. Even if you for

that you are calling to change the value of a parameter, you must pass it by reference using the ref or out keyword.Note: Passing parameters by reference also uses a ref-decorated parameter when calling a method.Comparison value passing and reference passingIn summary, a value pass is a copy of the value of a variable that is passed to the method so that the parameter of the method is the same as the value of the argument. Modifying a parameter in a called method is also an update to the data o