| 
| ? |  
| % format identifer. |  
| % Operator
(modulo). |  
| + Operator
(addition). |  
| - Operator
(Subtraction). |  
| / Operator
(division). |  
| /* Open a comment. |  
| // Inline
comment (C++). |  
| * Operator
(Multiplication). |  
| * width/percision
formating character. |  
| * Pointer
operator (Unary). |  
| */ Close a comment. |  
| -- Operator
(decrement). |  
| ++ Operator
(increment). |  
| = Operator
(Assignment, Equals). |  
| *= Operator. |  
| /= Operator. |  
| %= Operator. |  
| += Operator. |  
| -= Operator. |  
| <<=
Operator. |  
| >>= Operator. |  
| &= Operator. |  
| ^= Operator. |  | 
| ? continued |  
| |= Operator. |  
| == Operator. |  
| != Operator. |  
| > Operator. |  
| < Operator. |  
| >= Operator. |  
| <= Operator. |  
| &&
Operator. |  
| || Operator. |  
| ! Operator. |  
| &
Reference Variables (C++). |  
| & Bitwise
AND Operator (binary). |  
| | Bitwise
OR Operator (binary). |  
| ^ Operator. |  
| << Shift
Left Operator. |  
| >> Shift Right
Operator. |  
| ~ Operator. |  
| & Address
of Operator (Unary). |  
| ? Operator. |  
| : Operator. |  
| . Operator
(structure member). |  
| -> Operator
(structure pointer). |  
| ... in function
declarations. |  
| , Comma
Operator. |  | 
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| I continued |  
| input from the keyboard |  
| int keyword. |  
| Integer arrays |  
| Integer Constants. |  
| integer
formatting. |  
| I/O. |  
| isalnum Checks
whether a character is alphanumeric (A-Z, a-z, 0-9) |  
| iscntrl Checks
whether a character is a control character or delete ( decimal 0-31 and
127) |  
| isdigit Checks
whether a character is a digit (0-9) |  
| isgraph Checks
whether a character is a printable character, excluding the space (decimal
32) |  
| islower Checks
whether a character is a lower case letter (a-z). |  
| isprint Checks
whether a character is printable (decimal 32-126). |  
| ispunct Checks
whether a character is punctuation (decimal 32-47, 58-63, 91-96, 123-126) |  
| isspace Checks
whether a character is white space - space, CR HT VT NL, FF. |  
| isupper Checks
whether a character is an upper case letter (A-Z). |  
| isxdigit Checks
whether a character is hex digit (0-9, A-F, a-f). |  | 
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