operators in c

 

OPERATORS & EXPRESSIONS

An operator is a symbol that tells the compiler to perform a certain mathematical or logical

manipulation.

Operators are used in programs to manipulate data and variables.

Expressions combine variables and constants to produce new values.

Categories of Operators

1. Arithmetic Operators

2. Logical Operators

3. Relational Operators

4. Increment and Decrement Operators

5. Assignment operators

6. Bitwise Operators

7. Other Operators - Comma Operator, sizeof operator, ternary operator ?:, reference operator

&, dereference operator * , member selection operators


ARIHMEIC OPERATOR:

Operator:

+        addition or unary plus

-         subtraction or unary minus

*        multiplication ;

/         division

%       remainder after division

            (modulo division)



LOGICAL OPERATORS

Operator      Meaning                             Example

&&         Logical AND.  -->   True only if all  operands are true


||              Logical OR.    -->   True only if either one operand is true


!              Logical NOT.   -->    True only if the operand is 0 



RELATIONAL OPERATORS

Operator:

==     Equal to

>       Greater than

<       Less than 

!=      Not equal to 

>=     Greater than or equal to 

<=     Less than or equal to


INCREMENT AND DECREMENT OPERATORS

Increment and decrement operators are used for adding and subtracting one from the current value of

the variable. The increment and decrement operators can be categorized into pre and post operators

Pre Increment and Pre Decrement Operators:

The pre operators, like pre increment and pre decrement, the value of the variable is first incremented

or decremented and then the value of the variable is returned.

Post Increment and Post Decrement Operators:

In case of post, like post increment and post decrement , the current value of the variable is returned

and then it is incremented or decremented



ASSIGNMENT OPERATORS

Used for storing a value in a variable. The shorthand assignment

operators are used for combining the operator and assignment

Operator        Example         Same as

=                      a = b              a = b

+=                   a += b            a = a+b

-=                    a -= b             a = a-b

*=                    a *= b            a = a*b

/=                     a /= b             a = a/b

%=                   a %= b           a = a%b



BITWISE OPERATORS

Bitwise operators are special operator set provided by 'C. ' They are used in bit level programming. These operators are used to manipulate bits of an integer expression. Logical, shift and complement are three types of bitwise operators.

Operators 

&            Bitwise AND

|              Bitwise OR

^             Bitwise exclusive OR

~            Bitwise complement

<<          Shift left

>>         Shift right

Comments

Post a Comment

Popular posts from this blog

Storage Class

Image
  STORAGE CLASSES ● Storage classes are used to define the scope (visibility) and life-time of variables and/or functions ● Every variable and function in C has two attributes: type and storage class. ● There are four storage classes: • auto • static • extern or global • register THE AUTO STORAGE CLASS : The auto keyword is applied to all local variables automatically. It is the default storage class that is why it is known as automatic variable. EXAMPLE PROBLEM: #include<stdio.h> int main() { int a=10; auto int b=10;//same like above printf("%d %d",a,b); return 0; } Output: 10 10 The register storage class : ● Is used to define local variables that should be stored in a register instead of RAM ● Variable has a maximum size equal to the register size (usually one word) ● Can't have the unary '&' operator applied to it (as it does not have a memory location). { register int miles; } ● The register should only be used for variables that require quick ac...
Read more
  Input/output statements, Assignment statements           There are some library functions which are available for transferring the information between the computer and the standard input and output devices. These functions are related to the symbolic constants and are available in the header file. In C Language input and output functions are available as C compiler functions or C library provided with each C compiler implementation. These all functions are collectively known as Standard I/O Library functions. stdin : This file is used to receive the input (usually is keyboard file, but can also take input from the disk file). stdout : This file is used to send or direct the output (usually is a monitor file, but can also send the output to a disk file or any other device). stderr : This file is used to display or store error messages. Types of input/output function: Input output functions in C programming fall into two categories, namely, formatte...
Read more

Data types in C

Image
DATA TYPES The data type, of a variable determines a set of values that a variable might take and a set of operations that can be applied to those values. Data type refer to the type and size of data associated with the variable and functions. C language supports 2 different type of data types 1. Primary data types: These are fundamental data types in C namely integer(int), floating point(float), character(char) and void. 2. Derived data types: Derived data types are nothing but primary data types but a little twisted or grouped together like array, structure, union and pointer. INTEGER TYPE ● Integer data type allows a variable to store numeric values. ● “int” keyword is used to refer integer data type. ● The storage size of int data type is 2 or 4 or 8 byte. ● It varies depend upon the processor in the CPU that we use. If we are using 16 bit processor, 2 byte (16 bit) of memory will be allocated for int data type. ● Likewise, 4 byte (32 bit) of memory for 32 bit processor and 8 byte...
Read more