Hey there! in this post we are going to talk about fundamental types in C++.
Any value we use in our code, requieres a space in the computers memory. What the computer need to know to run the program correctly is how much space need the value and how to read it.
Here is a table with the fundamental types used in C++. The most common used are char, float, (signed) int double (float), bool and void.
Check it, and I hope it helps you.
| Group | Type names* | Notes on size / precision |
|---|---|---|
| Character types | char |
Exactly one byte in size. At least 8 bits. |
char16_t |
Not smaller than char. At least 16 bits. |
|
char32_t |
Not smaller than char16_t. At least 32 bits. |
|
wchar_t |
Can represent the largest supported character set. | |
| Integer types (signed) | signed char |
Same size as char. At least 8 bits. |
signed short int |
Not smaller than char. At least 16 bits. |
|
signed int |
Not smaller than short. At least 16 bits. |
|
signed long int |
Not smaller than int. At least 32 bits. |
|
signed long long int |
Not smaller than long. At least 64 bits. |
|
| Integer types (unsigned) | unsigned char |
(same size as their signed counterparts) |
unsigned short int |
||
unsigned int |
||
unsigned long int |
||
unsigned long long int |
||
| Floating-point types | float |
|
double |
Precision not less than float |
|
long double |
Precision not less than double |
|
| Boolean type | bool |
|
| Void type | void |
no storage |
| Null pointer | decltype(nullptr) |