Dart
Dart
HTML Canvas
HTML Canvas
Redis
Redis
Bash
Bash
JavaScript
JavaScript
C

Data Types

// create variables
int myNum = 5; // integer
float myFloatNum = 5.99; // floating point number
char myLetter = 'D'; // string
// High precision floating point data or numbers
double myDouble = 3.2325467;
// print output variables
printf("%d\n", myNum);
printf("%f\n", myFloatNum);
printf("%c\n", myLetter);
printf("%lf\n", myDouble);
Data Type Description
char character type
short short integer
int integer type
long long integer
float single-precision floating-point type
double double-precision floating-point type
void no type

Data format example

int myNum = 5;
float myFloatNum = 5.99; // floating point number
char myLetter = 'D';     // string
// print output variables
printf("%d\n", myNum);
printf("%f\n", myFloatNum);
printf("%c\n", myLetter);

Basic format specifiers

format specifier data type
%d or %i int integer
%f float single-precision decimal type
%lf double high precision floating point data or number
%c char character
%s for strings strings

Basic data types

Data Type Size Size Range Range Description Description
char 1 byte −128 ~ 127 single character/alphanumeric/ASCII
signed char 1 byte −128 ~ 127 -
unsigned char 1 byte 0 ~ 255 -
int 2 to 4 bytes −32,768 ~ 32,767 store integers
signed int 2 bytes −32,768 ~ 32,767
unsigned int 2 bytes 0 ~ 65,535
short int 2 bytes −32,768 ~ 32,767
signed short int 2 bytes −32,768 ~ 32,767
unsigned short int 2 bytes 0 ~ 65,535
long int 4 bytes -2,147,483,648 ~ 2,147,483,647
signed long int 4 bytes -2,147,483,648 ~ 2,147,483,647
unsigned long int 4 bytes 0 ~ 4,294,967,295
float 4 bytes 3.4E-38 ~ 3.4E+38
double 8 bytes 1.7E-308 ~ 1.7E+308
long double 10 bytes 3.4E-4932 ~ 1.1E+4932
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