Difference between revisions of "Variables"
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| − | + | =Variables= | |
| − | + | ===Declaring a Variable=== | |
CGS variables are declared using this form of statement: | CGS variables are declared using this form of statement: | ||
| − | + | [[:Category:Data_Types_Literals_and_Variables|data_type]] var_name; | |
where datatype is the data type of the variable and var_name is its name. You can declare a variable of any valid types. When you create a variable, you are creating an instance of its type. Thus, the capabilities of a variable are determined by its type, and the type of a variable cannot change during its lifetime. | where datatype is the data type of the variable and var_name is its name. You can declare a variable of any valid types. When you create a variable, you are creating an instance of its type. Thus, the capabilities of a variable are determined by its type, and the type of a variable cannot change during its lifetime. | ||
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All variables in CGS must be declared prior to their use. | All variables in CGS must be declared prior to their use. | ||
| − | + | ===Initializing a Variable=== | |
You must give a variable a value prior to using it. One way to do this is through an assignment statement (see Operators - The Assignment Operator). Another way is by giving it an initial value when it is declared. The general form of initialization is shown here: | You must give a variable a value prior to using it. One way to do this is through an assignment statement (see Operators - The Assignment Operator). Another way is by giving it an initial value when it is declared. The general form of initialization is shown here: | ||
| − | + | [[:Category:Data_Types_Literals_and_Variables|data_type]] var_name = value; | |
| − | Here, value is the value that is given to var_name when var_name is created. The value must be of the type | + | Here, value is the value that is given to var_name when var_name is created. The value must be of the type data_type. |
| − | + | ===Examples=== | |
| − | + | number n = 1; | |
| − | + | string s = "hello"; | |
__NOTOC__ | __NOTOC__ | ||
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Latest revision as of 10:41, 16 December 2011
Variables
Declaring a Variable
CGS variables are declared using this form of statement:
data_type var_name;
where datatype is the data type of the variable and var_name is its name. You can declare a variable of any valid types. When you create a variable, you are creating an instance of its type. Thus, the capabilities of a variable are determined by its type, and the type of a variable cannot change during its lifetime.
All variables in CGS must be declared prior to their use.
Initializing a Variable
You must give a variable a value prior to using it. One way to do this is through an assignment statement (see Operators - The Assignment Operator). Another way is by giving it an initial value when it is declared. The general form of initialization is shown here:
data_type var_name = value;
Here, value is the value that is given to var_name when var_name is created. The value must be of the type data_type.
Examples
number n = 1;
string s = "hello";
