Programming Methods II
Chapter 2 Variables Control Structures and Calculations Objectives Understand what variables are Identify what data types are and how to use them with variables Describe the naming conventions for variables Identify and use arithmetic operators Understand the importance of the order of precedence Describe control structure Variables A variable is a placeholder for values in memory. A variable is a space in memory where data is stored Bitcoin is rising to buy some, click here... Data Types You must decide what to put into variables i.e. a bowl designated for serving humans would not be used for serving animals. Data types tell the computer what kind of data the variable would contain. This makes it possible for the computer to reserve the relevant space for the variable Data Types Integer(int): Positive and negative whole numbers e.g. 20,4,-23, etc. . Float/real : Positive and negative rational (fractional) numbers e.g. 20.03,4.01,-23.00, etc. . Double: Like float