Python is a scripting language, and I also uh, but the real system of contact learning was at the end of last year (2013) to the beginning of this year (2014). Have to say is the official Python document is quite complete, if you are learning Python
Introduction: This is Php study note (3)-a detailed page of operators and control structures. It introduces PHP, related knowledge, skills, experience, and some PHP source code.
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" Join operator +" Output:3a34The logical operator returns the first value that can determine the result of an expressionExample ①Output:10NumberExample ②Output:TrueBooleanOften used in some frameworks | | To do browser compatibility, form: WINDOW.A
Atitit. Comparison of UI control structures between . NET C # Web and client WinForm. NET 4.5
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Winform
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I haven't updated it for a long time. it's very busy. The following describes the operators and control structures of php;
I. string insertion
To provide developers with the maximum flexibility to process string values, PHP provides both literal
In Java, expressions represent values, and statements represent execution actions. For example, expression 1 + 1 indicates the value, and thread. Start () indicates the execution action.All Syntax structures have values, even if unit is not used. If/
In Lua, all control structure blocks are ended with end tags.The result of an expression of the control structure can be any value, and in Lua only false and nil are false and the other values are true.
1. If
Copy Code code as follows:
650) this. width = 650; "src =" http://www.bkjia.com/uploads/allimg/131228/202G93b2-0.gif "/> the control structure can be divided into three types:Sequence, branch, and loop
1. Order: statements are executed in sequence.
2. Branch: select to
Variable definition: The variable is derived from mathematics. is an abstract concept that can store computational results or represent values in a computer language. That is, when the program is running, its value is the amount allowed to
IV. Control Structure1.if/elseIn addition to the basic usage, the IF/ELSE statement can be used to assign values instead of ?: operators. This is because in Scala, each statement block has a value, which is the value of the last statement in the
Look at the agile development process for two days, am I an agile blogger? Haha o (∩_∩) o1 Packagea.b;2 3 Public classthree4 {5 Static voidExpression ()6 {7System.out.println ("One, basic expression of learning");8 9
The National Day holiday is approaching. These two days are a little blank. After translating some content in the manual, it is a small gift for phper.
I wanted to update all the new php5.3 content, but I found that the manual has been greatly
The National Day holiday will be very happy. These two days a little empty, translated some of the contents of the manual, is a small gift for the phper.
The new contents of all PHP5.3 were intended to be updated, but there were significant changes
1, control structure 1.1 piece branch 1.2 circulation 1.2.1 while loop 1.2.2 for loop 2, exception handling 2.1 Catch Exception 2.2 Produce exception 2.3 Custom exception 3, custom function 3.1 name and Docstrings 3.2 parameter and parameter split 3.
A String insertion
To provide maximum flexibility for developers to handle string values, PHP provides a literal insert and content insertion
A method.
Double quotation marks provide maximum flexibility because both the variable and the transfer
1. Basic cycleEnd with end loop starting with loop. To avoid endless loop, you must use the exit or exit when statement.Create Table temp (cola int );DeclareI INT: = 1;BeginLoopInsert into temp values (I );Exit when I = 10;I: = I + 1;End loop;End;
If control structure
Chomp (My $a = ); User input variable $a value
if ($a > 0) { If $a is greater than 0 executes command
print "$a is larger than 0\n";
}
elsif ($a = = 0) { if $a equals 0 then execute command
print "$a
1. Unless control structure
Execute when the condition is false, opposite to if
Else can be attached.
2. Until control structure
If the condition is false, it is executed until the condition is true;
3. Conditional Modifiers
The effect is
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