The Android SDK requires that you add the following environment variable:
ANDROID_HOME = <installation location>\android-sdk-windows
This is used to determine where the SDK can be found.
In addition, it is recommended you also add the tools and platform-tools sub-folders to your PATH:
PATH = <existing path>;%ANDROID_HOME%\tools;%ANDROID_HOME%\platform-tools
Note how the path makes use of the ANDROID_HOME environment variable.
With these variables in place, you can more easily execute the commands contained therein without specifying the path to those commands.
Start > right-click My Computer > Properties > Advanced > Environment Variables
In Java, there are three kinds of variables: local variables, instance variables, and class variables. Variables have their scopes. Different kinds of variables have different scopes. A variable is shadowed if there is another variable with the same name that is closer in scope. In other words, referring to the variable by name will use the one closest in scope, the one in the outer scope is shadowed.A Local Variable Shadows An Instance VariableInside a class method, when a local variable have the same name as one of the instance variable, the local variable shadows the instance variable inside the method block.
When There is No Need to Change the Values of the Variables In Entire lifetime of That variables then we must use that Variable as Final Variable.
There are 'constant variables' , 'independant variables' and 'dependent variables' Constant Variable- things in the experimment that should be kept the same Independant variables- something that can be varied in an experiment Dependant variable- something that can be affected
Constants, static variables and global variables are allocated in the program's data segment at compile time. Local variables are allocated on the stack at runtime. Variables cannot be allocated on the heap, you must use a constant, static variable, global variable or local variable to store the start address of a dynamic memory allocation. The variable must be a raw pointer or a reference handle (a smart pointer).
Start > right-click My Computer > Properties > Advanced > Environment Variables
System environment variables
The test variable (independent variable) controls the outcome variable (dependent variable).
independent variable,depedent variable and control variable are the 3 kinds of variables.
the dependant variable
independent variable called also predictor variables,explanatory variables,manipulated variables etc.
A Controlled Variable is a variable that will stay the same. An Uncontrolled Variable is a variable that stays at random during testing.
Dependent variables and independent variables refer to values that change in relationship to each other. The dependent variables are those that are observed to change in response to the independent variables. The independent variables are those that are deliberately manipulated to invoke a change in the dependent variables. In short, "if x is given, then y occurs", where x represents the independent variables and y represents the dependent variables. Depending on the context, independent variables are also known as predictor variables, regressors, controlled variables, manipulated variables, explanatory variables, or input variables. The dependent variable is also known as the response variable, the regressand, the measured variable, the responding variable, the explained variable, the outcome variable, the experimental variable or the output variable. This answer was coppied onto this page by tom hills of falmouth waii
So that you can know what is the manipulating variable, the controlling variable, and the responding variable! To control the variables!
Right click my computer and click properties click the advanced tab. click the environment variables button at the bottom the bottom pane should say "system variables". The path variable is in there, just under the OS variable.
Base Variables and Detector varialbles
Ordinary variable are those variables that can store only one (1) variables