varsity college 3

Basic Concepts of Naming and Formatting

• Variable Naming Conventions:

  • Must start with a letter.

  • Use camel casing for variable names (e.g., movieTitle).

  • First word is lowercase; subsequent words start with uppercase letters.

• Example of Camel Case:

  • Movie title: words separated by a capital letter at the start of additional words.

Correctness of Statements

• Evaluating Naming:

  • Correctness assessed based on naming effectiveness and clarity.

• Importance of Meaningful Information:

  • Names should convey what data represents.

Types of Casing

• Overview of Casing Styles:

  • Camel case: used for variable names.

  • Other casing types mentioned: Castile, Hungarian, etc.

Mathematical Expressions

• Operator Placement Rules:

  • Operand must not be to the left of the assignment operator; it should represent a memory address.

  • Standard arithmetic operators: addition (+), subtraction (-), multiplication (*), and division (/).

  • Operations must start with variables before assignment operators.

Order of Operations (Precedence)

• Basic Order Rules:

  • Parentheses evaluated first.

  • Multiplication and division evaluated next, followed by addition and subtraction (left to right).

• Example Breakdown:

  • For operation handling mathematical expressions, the order determines outcome effectively.

Mathematical Operators Categories

• Three key categories to remember:

  1. Arithmetic Operators: Basic mathematical operations.

  2. Relational Operators: Used for making comparisons or program decisions.

  3. Logical Operators: Connect relational expressions.

Logical Operators Explained

• AND Operator:

  • Returns true only if both operands are true; otherwise, false.

  • Example: x > 2 AND x < 5 must satisfy both conditions.

• OR Operator:

  • Returns true if at least one of the conditions is true.

• NOT Operator:

  • Negates the operand; returns true if original operand is false and vice versa.

Variable Naming Practice

• Variables associated with data types:

  • Name of vendor company: Data type = String.

  • Example variable name could be vendorCompanyName.

  • Always employ camel casing in naming variables.
    - Questions for Practice:

  • Determine data types for various examples, enhancing comprehension of variable naming and associated data structures.

Conclusion

• Key takeaways from variable naming and mathematical operation principles:

  • Use naming that reflects data intent and maintain proper casing for clarity.

  • Understand operator precedence to formulate clear and effective expressions.