Mar 30, 2020
Types of Variables
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Types of Variables
Types of Variables via @ http://www.liveinfographic.com/ Matlabguru, March 30, 2020 at 10:43AM
ONE MISTAKE in VIDEO : The term Access specifier is used by c++ programmers not in java. In JAVA Officially we use ACCESS MODIFIER but i have used access spe...
What is variable ?
1. Variable is a name of memory location where data is stored. 2. The value of variable can vary, means value can be changed. There are three types of variables : 1. Local Variables : 1.1 DECLARED : inside methods, constructors or blocks. 1.2 SCOPE : within the methods, constructors or blocks but not outside of them. 1.3 MEMORY ALLOCATION : when method, constructor or block is invoked variable is allocated; when exits, variable gets destroyed. 1.4 STORED MEMORY : stack memory 1.5 DEFAULT VALUES : doesnt have any default value, so it should be assigned before use. 1.6 ACCESS MODIFIERS : public, private or protected access specifier cannot be used. 2. Instance Variable : 2.1 DECLARED : in a class but outside methods, constructors or blocks. 2.2 SCOPE : inside the class, within all methods, constructors or blocks. 2.3 MEMORY ALLOCATION : when object is created, variable allocated memory; when object destroyed, memory releases. 2.4 STORED MEMORY : heap memory 2.5 DEFAULT VALUES : have default values eg. int has 0 value, boolean false, String null etc. 2.6 ACCESS MODIFIERS : any access modifiers can be used. 2.7 HOW TO ACCESS : a) can be accessed directly by calling the variable name inside the class. b) in static methods they should be called using the fully qualified name, ie objectRefName.variable_name. 3. static variable : 3.1 DECLARED : with static keyword in a class but outside methods, constructors or blocks. 3.2 SCOPE : similar to instance variable ie inside the class, within all methods, constructors or blocks including static part 3.3 MEMORY ALLOCATION : when we run program and .class file is loaded, variable allocated; when class file unload, variable gets destroyed. 3.4 STORED MEMORY : non-heap memory or static memory 3.5 DEFAULT VALUES : have default values eg. int has 0 value, boolean false, String null etc. 3.6 ACCESS MODIFIERS : any access modifiers can be used. 3.7 HOW TO ACCESS : a) directly b) by using class name b) by using object reference name
Types of Variables used in Research
Types of Variables used in Research
Types of Variables used in Research
Types of Variables used in Research
There are twenty eight types of variables used in research. Few variables are the synonyms of another variable. Basically variables are divided in to two a s dependent and independent variables. The Following are the types of variables used in Research
Binary variable Obsevations(i.e., dependent variables) that occur in one…
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Types of variables
This presentation has been made for the Advance Research Methodology class at M.Phil Level. This include the maximum information for the Types of Variables.
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