local variables and global variables

1. There must be a clear end condition.2. Each time a deeper level of recursion is reached, the problem size should be reduced compared to the previous recursion3. Recursive efficiency is not high, too many recursion levels will cause stack overflow(

Recently, there is a question about interview in the group, the basic knowledge about global variables and local variables is examined:Fun Foo () {var a = b = 0;}Let's choose the values of a and B respectively, perhaps not carefully, we probably

depending on the scope of the variable, it can be divided intoLocal Variables:Definition: A variable defined inside a function or code blockScope: Start with the line that defines the variable until the end of the code blockDeclaration period:

#include int x = 77; /* global variable x*/void Fn1 (){extern int y; /* Use external global variable y, if no extern compilation does not pass */printf ("Fn1 (): x=%d,y=%d\n", x, y); x=77,y=88;}void Fn2 (){extern int y; /* Use external global

Learning Source: http://www.cnblogs.com/alex3714/articles/5885096.html‘‘‘School = "Old boy"def change (name):Global School #函数内修改全局变量School = "Wo de"#name = ' Li ' #这个函数就是这个变量的作用域# print (name)Name= ' Alx 'Change (name)Print

What are global variables and local variables?Outside a function, a piece of code is the variable that is assigned the value at the beginning. It can be referenced by multiple functions. This is the global variable;The variable name defined in the

1 #!/usr/bin/env python2 #-*-coding:utf-8-*-3 #author:james Tao4 5 #Global variables: variables defined at the first level, at the beginning of the program, are called global variables, scopes: the entire program6School='ABC'7 8 #local variable: A

See the following code:This code is actually about how JavaScript creates a private variable and a private method. This is not a big problem. It should be noted that, after entering the class, the private methods of the class can use the private

A local variable is identified with a @ identifier, with a global variable of two @ (commonly used global variables are generally defined); Declare local variable syntax: DECLARE @ variable name data type; For example: declare @num int; Assignment:

A local variable is identified with one @, and a global variable is identified with two @ (common global variables are usually defined). declare the local variable Syntax: declare @ variable name data type. For example: declare @ numint; value

Speaking of global variables and local variables today, the foreign teacher said that global variables are like stars in Hollywood and everyone knows. Local variables must be declared before they can be used. Otherwise, people do not know. # The

Local variables: variables defined in a function, scoped to the current function, only work on the current function. Global variables: Variables defined at the beginning of the code, scoped to the entire code, work on the entire code. Let's take a

After the loop, I is not recognized for I, so here I only action in the FOR statement IBecause the blue and red definitions are the same, the external blue I is shielded from the for, but the outside I only recognize the blue IGlobal variablesSo a

First, local variablesvariables defined inside a function are internal variables, they are only valid within the scope of the function, that is, only this function can use them, is not available outside of the function, if used, there will be a

Believe that a lot of students from c++/java/c# and so on, may make such a mistake: Outside a large for loop, write a lot of code after, but also a loop, we do not want to throw another I, we in other languages are so dry, but in PHP this

Local and global variables in php. How can I understand the scope in php? next we will introduce the local variables: variables declared inside the function. Global variables: describes in detail how to understand the scope of variables declared

#014 # example where only variables in the function can be modified: def poweronlocal (appleeaten): Print 'apple is eaten! ', # Note, here, the comma is used to prevent automatic line breaks in python appleeaten = true # End of Def appleeaten =

Local variable: A variable defined inside a function that is scoped to the function definition.Global variable: A variable defined outside a function whose scope is defined at the end of the file.In PHP, functions are treated as separate patches, so

Local variables Variables defined within a function are internal variables that are valid only within the scope of this function, that is, they can only be used within this function and cannot be used outside of this function. Similarly, variables

Variable substation and global variables in the shellBash's variables are global variables by default, and can be called within a script, regardless of where (and in the body of the function), a variable in the function body can be called outside