Data Types

// Declaration without initialization
int x;

// Declaration with initialization
int y = 10;
int valorUno = 5;
int resultado = 0;

int a = 0;
int b = 42;
int c = 1000;

// Declaration with decimal value
float pi = 3.14;
float area = 0.0;

float x = 3.14;
float y = 10.0;
float z = 0.5;

program {
    float pi = 3.14;
    int radius = 10;
    
    // Mixed arithmetic (int and float)
    float area = pi * radius;
}

// Boolean declaration
bool activo = 1;  // True
bool error = 0;   // False

program {
    bool activo = 1;
    int x = 10;
    
    if (activo == 1) {
        x = x + 100;
    }
}

int x = 10;        // ✓ Correct
float pi = 3.14;   // ✓ Correct
bool flag = 1;     // ✓ Correct

// Variables must be declared before use
y = 5;             // ✗ Error: y not declared

TIPO : 'int' | 'float' | 'bool'

NUMERO : [0-9]+ ('.' [0-9]+)?

10       // Integer
42       // Integer
3.14     // Float
0.5      // Float
100.0    // Float

.5       // ✗ Must start with digit
10.      // ✗ Must have digits after decimal
3.14.15  // ✗ Only one decimal point allowed

program {
    // Integer variables
    int x = 10;
    int y = 5;
    int resultado = 0;
    
    // Floating-point variable
    float pi = 3.14;
    
    // Boolean variable
    bool activo = 1;
    
    // Arithmetic with different types
    resultado = x + y * 2;          // 10 + 5 * 2 = 20
    float area = pi * 10;            // 3.14 * 10 = 31.4
    
    // Boolean in conditions
    if (resultado > 15 && activo == 1) {
        x = x + 100;
    }
}