Basic Data Types Meanings in C++
Basic data types and meanings in C++ programming with type, meaning, constant examples, and printf chars are listed below. You can find your desired data type in the following tables.
Basic Data Types Meanings
| Type |
Meaning |
| int |
Integer value; that is, a value that contains no decimal point; guaranteed to
contain at least 16 bits of precision. |
| short int |
Integer value of reduced precision; takes half as much memory as an int on some
machines; guaranteed to contain at least 16 bits of precision. |
| long int |
Integer value of extended precision; guaranteed to contain at least 32 bits of
precision. |
| long long int |
Integer value of extra extended precision; guaranteed to contain at least 64 bits of
precision. |
| unsigned int |
Positive integer value; can store positive values up to twice as large as an int;
guaranteed to contain at least 16 bits of precision. |
| float |
Floating-point value; that is, a value that can contain decimal places; guaranteed
to contain at least six digits of precision. |
| double |
Extended accuracy floating-point value; guaranteed to contain at least 10 digits of
precision. |
| long double |
Extraextended accuracy floating-point value; guaranteed to contain at least 10
digits of precision. |
| char |
Single character value; on some systems, sign extension might occur when used in an
expression. |
| unsigned char |
Same as char, except ensures that sign extension does not occur as a result of
integral promotion. |
| signed char |
Same as char, except ensures that sign extension does occur as a result of integral
promotion. |
| _Bool |
Boolean type; large enough to store the values 0 or 1. |
| float _Complex |
Complex number. |
| double _Complex |
Extended accuracy complex number. |
| long double _Complex |
Extraextended accuracy complex number. |
| void |
No type; used to ensure that a function that does not return a value is not used as
if it does return one, or to explicitly 'discard' the results of an expression, Also
used as a generic pointer type (void *). |
Basic Data Types
| Type |
Constant Examples |
printf chars |
| char |
'a', '\n' |
%c |
| _Bool |
0,1 |
%i, %u |
| short int |
— |
%hi, %hx, %ho |
| unsigned short int |
— |
%hu, %hx, %ho |
| int |
12, -97, 0xFFE0, 0177 |
%i, %x, %o |
| unsigned int |
12u, 100U, 0XFFu |
%u, %x, %o |
| long int |
12L, -2001, 0xffffL |
%li, %lx, %lo |
| unsigned long int |
12UL, 100ul, 0xffeeUL |
%lu, %lx, %lo |
| long long int |
0xe5e5e5e5LL, 500ll |
%lli, %llx, &llo |
| unsigned long long int |
12ull, 0xffeeULL |
%llu, %llx, %llo |
| float |
12.34f, 3.1e-5f, 0x1.5p10,0x1P-1 |
%f, %e, %g, %a |
| double |
12.34, 3.1e-5, 0x.1p3 |
%f, %e, %g, %a |
| long double |
12.341, 3.1e-5l |
%Lf, $Le, %Lg |