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C Reference
Format Specifiers
| Character | Format |
|---|---|
| %c | Character |
| %d | Integer |
| %f | Floating Point Integer |
| %i | Integer |
| %E | Scientific Notation |
| %e | Scientific Notation |
| %g | uses %f or %e whichever is shorter |
| %G | uses %f or %e whichever is shorter |
| %o | Unsigned Octal |
| %s | String |
| %X | Unsigned Hex |
| %x | Unsigned Hex |
| %u | Unsigned Integer |
| %p | Displays matching argument that's a pointer. |
| %n | Number of characters written so far |
| %% | output a % |
The 32 C Keywords
| Word | What it is |
|---|---|
| auto | a storage class specification |
| break | a statement |
| case | statement |
| char | type specification |
| const | Storage Class Modification |
| continue | a statement |
| default | a label |
| do | a statement |
| double | Type specifacation |
| else | statement |
| enum | type specification |
| extern | storage class |
| float | type specifier |
| for | statement |
| goto | statement |
| if | statement |
| int | type specification |
| long | Type specification |
| register | Storage Class Specification |
| return | Statement |
| short | type specification |
| signed | type specification |
| sizeof | Operator |
| static | storage class specification |
| struct | type specification |
| switch | statement |
| typedef | statement |
| union | type specification |
| unsigned | type specification |
| void | type Specification |
| volatile | storage class modification |
| while | statement |
Character Constants
| Character | Meaning of character |
|---|---|
| \a | alert audibly |
| \b | Backspace |
| \0 | null |
| \\ | backslash |
| \r | carrage return |
| \n | newline |
| \f | form feed |
| \t | tab |
| \v | tab (vertical) |
| \" | double quote |
| \' | single quote |
| \N | Octal Constant (N is variable) |
| \xN | Hex Constant (N is variable |
Operators
| Operator | What it is |
|---|---|
| || | Logical OR |
| ! | Logical negation |
| ?: | Conditional |
| >> | right shift |
| << | left shift |
| && | Logical AND |
| ^ | OR (XOR) bitwise |
| ~ | compliment (bitwise) |
| < | lessthan |
| > | greater than |
| == | equal to |
| ++ | increment |
| -- | decrement |
| >= | greater than, or equal to |
| <= | less than, or equal to |
| = | Assignment |
| += | Addition |
| -= | subtraction |
| sizeof | Size Of |
| | | OR (bitwise) |
| & | AND (bitwise) |
| *= | multiplication |
| /= | division |
| %= | modulus (remainder) |
| != | not equal to |
| - | Unary Minus |