Denietra Franklin
PT1420
Juan Hernandez
4/13/2015

Unit 4 Research Assignment

1. List 5 advantages and 5 disadvantages of using global variables.
Advantages:

1.It is accessible to all the modules in a program.

2.You only have to declare it once outside the modules.

3.It is good to use it for constants you want to keep consistant.

4. It simplifies maintenance, avoids duplication of local constants.

5. It can make a program easier to read in reference to constants.

Disadvantages:
1.It makes debugging difficult.

2.Any statement in a program can change the value.

3.If modules use global variables it is dependent upon the module and if other modules are presented you have to redesign all over each time.

4.It makes a program hard to understand since it can be modified and have to be aware of all other parts of the program that access it.

5.Global variables are not writing direct into flowcharts.

2. How can you declare global and local variables in flowcharts?

Global variables are displayed in pseudocode but not in flowcharts directly.

3. How can you declare global and local variables in pseudocode?

You can declare variables using the Global, Local, or Component statements, or you can use local variables without declaring them. Here are some examples:

Local Number &AGE;
Global String &OPER_NICKNAME;
Component Rowset &MY_ROWSET;
Local Any &SOME_FIELD;
Local ApiObject &MYTREE;
Local Boolean &Compare = True;
Variable declarations are usually placed above the main body of a PeopleCode program (along with function declarations and definitions). The exception is the Local declaration, which you can use within a function or the main section of a program. You can declare variables as any of the PeopleCode data types. If a variable is declared as an Any data type, or if a variable is not declared, PeopleTools uses