Data Tpes rules

• int / int = int
• double / int = double

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print data type of a variable

Syntax: typeid(&variableName).name()

int main()
{
    int x =  4 ;
    cout << typeid(&x).name(); // print the type of &x

    return 0;
}

/* Ouput:
⏩ [ int * ]

This means data type of (&x) is 'pointer type (int*)'

 */

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sizeof() - size of varaible in bytes

#include <iostream>

int main() // assume a 32-bit application
{
    char* chPtr{};        // chars are 1 byte
    int* iPtr{};          // ints are usually 4 bytes
    long double* ldPtr{}; // long doubles are usually 8 or 12 bytes

    std::cout << sizeof(chPtr) << '\n'; // prints 4
    std::cout << sizeof(iPtr) << '\n';  // prints 4
    std::cout << sizeof(ldPtr) << '\n'; // prints 4

    return 0;
}

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