Type Safety in C

C++ enforces types, that means, every variable has a type and then that is its type forever and it can't be changed.

Expressions like 2 or 2+2 also have a type.

It is okay to "promote"

• put an integer (eg 2) into a float

The compiler will however warn you if you "demote" and throw away information

• put a floating point number (say 4.9) into an integer

This applies for variables initialised using auto as well.

Some combinations are just not allowed and will result in compiler errors

• put a string into an int
• multiply a string and a float

Please leave out comments with anything you don't understand or would like for me to improve upon.

Thanks for reading!