C Arithmetic Operators
| Operator | Meaning of Operator |
| + | addition or unary plus |
| - | subtraction or unary minus |
| * | multiplication |
| / | division |
Full Answer
What does %= mean in C?
%= Modulus AND assignment operator. It takes modulus using two operands and assigns the result to the left operand. C %= A is equivalent to C = C % A.
What does '#' mean in C?
"#" is a Pre-Processor directive. The C Pre-Processor modifies a source file before handing it over to the Compiler. Example: The most common example of use of # in C is the #include
What does '!' Mean in C?
simply just reverses the meaning of its operand. The operand or the expression must be of arithmetic or pointer type. But the operand/result of expression is implicitly converted to data type bool (Boolean 0 means false, Non zero means True).
What does hashtag mean in C?
24th August 2021, 7:50 AM. Brain & Bones. +3. Aditya In C, the hashtag symbol '#' tells you that a pre-processor directive is about to be defined. Pre-processor directives are run before compiling the code; it's like editing your source code with certain text substitutions and all.
What does &= mean in C?
It means to perform a bitwise operation with the values on the left and right-hand side, and then assign the result to the variable on the left, so a bit of a short form.
What does <= mean in programming?
<= Checks if the value of left operand is less than or equal to the value of right operand, if yes then condition becomes true.
What kind of operator is the <= operator?
Comparison operatorsOperatorMeaning==Equal to - True if both operands are equal!=Not equal to - True if operands are not equal>=Greater than or equal to - True if left operand is greater than or equal to the right<=Less than or equal to - True if left operand is less than or equal to the right2 more rows
What is & and * operators in C?
The & is a unary operator in C which returns the memory address of the passed operand. This is also known as address of operator. <> The * is a unary operator which returns the value of object pointed by a pointer variable. It is known as value of operator. It is also used for declaring pointer variable.
What is __va_args __?
Here also we have to include ellipsis, The '__VA_ARGS__' is used to handle variable length arguments. Concatenation operator '##' is used to concatenate the variable arguments. In this example, the Macro will take variable length argument like the printf() or scanf() function.
How do you use #define C?
#define in C#define in C. ... Syntax: ... value: defines the value of the constant.Expression: is the value that is assigned to that constant which is defined. ... E.g.: #include
What do the letters A, B, and C stand for in a table?
For the purposes of these tables, a, b, and c represent valid values (literals, values from variables, or return value), object names, or lvalues, as appropriate. R, S and T stand for any type (s), and K for a class type or enumerated type.
What is the precedence of operators in C++?
Descending precedence refers to the priority of the grouping of operators and operands. Considering an expression, an operator which is listed on some row will be grouped prior to any operator that is listed on a row further below it. Operators that are in the same cell (there may be several rows of operators listed in a cell) are grouped with the same precedence, in the given direction. An operator's precedence is unaffected by overloading .
What languages use C++?
Most of the operators available in C and C++ are also available in other C-family languages such as C#, D, Java, Perl, and PHP with the same precedence, associativity, and semantics.
What are the simplest expressions in C#?
The simplest C# expressions are literals (for example, integer and real numbers) and names of variables. You can combine them into complex expressions by using operators. Operator precedence and associativity determine the order in which the operations in an expression are performed.
What are the types of operators in C#?
C# provides a number of operators. Many of them are supported by the built-in types and allow you to perform basic operations with values of those types. Those operators include the following groups: 1 Arithmetic operators that perform arithmetic operations with numeric operands 2 Comparison operators that compare numeric operands 3 Boolean logical operators that perform logical operations with bool operands 4 Bitwise and shift operators that perform bitwise or shift operations with operands of the integral types 5 Equality operators that check if their operands are equal or not
What is the operator in C++?
The operator ! is the C++ operator for the Boolean operation NOT. It has only one operand, to its right, and inverts it, producing false if its operand is true, and true if its operand is false. Basically, it returns the opposite Boolean value of evaluating its operand. For example:
What is compound assignment?
Compound assignment operators modify the current value of a variable by performing an operation on it . They are equivalent to assigning the result of an operation to the first operand:
When to use comma operator?
The comma operator (,) is used to separate two or more expressions that are included where only one expression is expected. When the set of expressions has to be evaluated for a value, only the right-most expression is considered.
What is the name of a constant?
NAME: is the name of a particular constant. It can either be defined in smaller case or upper case or both. Most of the developers prefer the constant names to be in the upper case to find the differences. value: defines the value of the constant. Expression: is the value that is assigned to that constant which is defined.
What is #define in a file?
The #define is a preprocessor directive allows you to specify a name and replacement text. As the preprocessor parses the source file, each occurrence of the name is replaced by its associated text. The scope of #define is limited to the file in which it is defined.
What is the preprocessor directive in C?
In the C programming language, the preprocessor directive acts an important role within which the #define directive is present that is used to define the constant or the micro substitution. The #define directive can use any of the basic data types present in the C standard. The #define preprocessor directive lets a programmer or a developer define ...
Is #defines available in a different file?
So, #defines which are created in one source file are NOT available in a different source file. Typically, #defines is shared between multiple files are stored in a header file (*.h) which is included in each source file that requires the #define.
Can macro definitions be changed?
Macro definitions cannot be changed within the program’s code as one does with other variables, as macros are not variables. The #define is usually used in syntax that created a constant that is used to represent numbers, strings, or other expressions.
String concatenation
When one or both operands are of type string, the + operator concatenates the string representations of its operands (the string representation of null is an empty string):
Delegate combination
For operands of the same delegate type, the + operator returns a new delegate instance that, when invoked, invokes the left-hand operand and then invokes the right-hand operand. If any of the operands is null, the + operator returns the value of another operand (which also might be null ).
Operator overloadability
A user-defined type can overload the + operator. When a binary + operator is overloaded, the += operator is also implicitly overloaded. A user-defined type cannot explicitly overload the += operator.
