Fundamental Data Types in C++

No, void cannot be used to define a variable, but it can be used as a function return type.

A data type tells the type and size of data a variable can hold.

Fundamental data types are built-in and predefined data types like int, char, float, double, bool, and void.

Size of int is 4 bytes (32 bits) and range is from -2147483648 to 2147483647.

The formula is -2^(n-1) to +2^(n-1) -1, where n is the number of bits.

The formula is 0 to 2^n -1.

The range is -32768 to 32767.

The range is 0 to 65535.

Size is 8 bytes (64 bits) with a range of -2^63 to +2^63 - 1.

The size of char is 1 byte (8 bits).

Signed char ranges from -128 to 127, unsigned char ranges from 0 to 255.

It depends on the compiler. Some may default to signed char, others to unsigned char.

Float has 4 bytes size (32 bits) and precision up to seven decimal digits.

Float type range is 1.17549E - 38 to 3.40282E + 38 for positive values.

Float provides precision up to seven decimal digits, meaning values can be accurately represented up to seven digits after decimal.

Double has a size of 8 bytes and precision up to 15 decimal digits.

Range is 2.22507E - 308 to 1.79769E + 308 for positive values.

Bool is used to represent truth values, true and false.

Size of bool type is one byte (8 bits).

Void indicates the absence of data or no value.

No, void cannot be used to define a variable, but it can be used as a function return type.

A data type tells the type and size of data a variable can hold.