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Is it possible to undeclare variables in C#? If so, how?
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Declaring (Creating) Variablestype variableName = value; Where type is one of C types (such as int ), and variableName is the name of the variable (such as x or myName). The equal sign is used to assign a value to the variable.
To declare (create) a variable, you will specify the type, leave at least one space, then the name for the variable and end the line with a semicolon ( ; ). Java uses the keyword int for integer, double for a floating point number (a double precision number), and boolean for a Boolean value (true or false).
a) General syntax for declaring a variable Eg:- char Final_Grade; // Final_Grade is a variable of type char, and no value is assigned to it. data_type variable_name = val; Eg:- int age = 22; // age is a variable of type int and holds the value 22. Here, data_type specifies the type of variable like int, char, etc.
A variable is a name of the memory location. It is used to store data. Its value can be changed, and it can be reused many times. It is a way to represent memory location through symbol so that it can be easily identified.
close the scope (introduced with '{') that contains the variable declaration:
int c=0;
{
int a=1;
{
int b=2;
c=a+b;
} // this "undeclares" b
c=c+a;
} // this "undeclares" a
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