C Reference - Constants

Numbers characters and string constants.

See enum end const in data types page.

Data Type Constants

Syntax	Description	Example
0x hexnum 0X hexnum	hexadecimal number	int x=0x7FFF0000;
0 octnum	octal number	int x=07654321;
num u num U	unsigned integer number constant	unsigned int x=1000U;
num l num L	long integer number constant	long x=-99999L;
num ul num UL	unsigned long integer number constant	unsigned long x=99999L;
num ll num LL	long long  integer number constant	long long x=-888888LL;
num ull num ULL	unsigned long long integer number constant	unsigned long long x=100ULL;
num f num F	float number constant	float x=0.005F;
num l num L	long double number constant	long double x=0.005L;
num e±exp num E±exp	floating point exponent number constant	double x=5.2E-3;
'char'	character constant	char c='A';
"string"	string constant	char name[6]="Hello";

 

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