Variables and Types in A++

A++ is a statically-typed language with type inference. This guide covers the variable system and built-in types.

Basic Types

Primitive Types

// Numbers
int age = 25;            // Integer
float price = 19.99;     // Floating-point number
double precise = 3.14159265359;  // Double precision float

// Text
char grade = 'A';        // Single character
string name = "Alice";   // Text string

// Boolean
boolean isValid = yup;   // A++ uses yup/nope instead of true/false
boolean isDone = nope;

Type Inference

Not supported as yet.

Type Conversion

Implicit Conversion

A++ performs safe implicit conversions:

int x = 5;
float y = x;      // int to float is safe

Best Practices

1. Use Descriptive Names

// Bad
int x = 5;

// Good
int userAge = 5;

2. Initialize Variables

// Bad
int count;

// Good
int count = 0;

4. Choose Appropriate Types

// Bad: Using float for whole numbers
float age = 25.0;

// Good: Using int for whole numbers
int age = 25;

Next Steps

• Learn about Control Flow
• Explore Functions
• Study Error Handling