lots of bs in there. the literal "42.5" is not a float, its a double and every compiler should warn you about the implicit conversion. class is not a thing in C. struct is the only keyword for user defined types. typedef does not define a type, it defines an alias. Article Looks like it is written by AI More on reddit.com

The top statement isn't true The compiler uses type information to determine how to interpret those bytes, which functions to call, etc. Even in your example, if you look at the actual bytes of x and y, they won't be the same. They may have the same number of bits, but not the same content. More on reddit.com

Firstly, how does the size of a data type in bits or bytes matter Picture a 1-bit number. It can only be 0 or 1, so no matter what you represent those to mean, you can only represent two values with one bit. A 2-bit number can represent 4 values, a 3-bit does 8 values, etc. So the bit-length increases the storage needed for the number, but also increases the number of values that it can represent. and how can it be used in a program? If you know the range of values that you need, you can choose the smallest data type that can represent it (although honestly, that's often not necessary). Or if you know that you're building a system that needs to function when built for diverse hardware and OSes, you can pick a specific bit-width for your values since things like int can be different sizes in different environments. Secondly, why do floats produce such weird numbers that don’t seem to make sense mathematically? Here's an example. A 32-bit float uses 1 bit for the sign (positive or negative), 23 bits for a base number (effectively 24 though, because the leading bit is assumed to be 1), and 8 bits for an exponent. So, the number is constructed effectively like: sign * base * 2exponent This has some quirks, like there are some numbers that we can cleanly represent in base-10 that can't be exactly represented by one of these floating points. 0.1 is an easy example. And when you get out to the edges that use high exponents, you start getting wider gaps in the numbers that you can accurately represent, even considering just integers. More on reddit.com

In C++, every object is of certain type. Even number literals such as 3, 4, and 4.0 are of certain type. Even arithmetic expressions such as 4 / 3 and 4.0 / 3 are of certain type. For example, literal 123 is of type int. Literal 123.0 is of type double. An expression where all operands are of type int, the entire expression is also evaluated to be of type int. In an expression where at least one of the operands is of type double, the other operands get promoted to type double as well, resulting in an entire expression being of type double. Further reading: arithmetic expressions, integral promotion and implicit conversion. In your examples, implicit type conversion occurs. The following statement represents initialization: int x = 123; whereas, the following example represents an assignment: int x; x = 123; // assignment More on reddit.com