by Dinesh Thakur
Category: Operator

An operator is a symbol which helps the user to command the computer to do a certain mathematical or logical manipulations. Operators are used in C language program to operate on data and variables. C has a rich set of operators which can be classified as

by Dinesh Thakur
Category: Operator

by Dinesh Thakur
Category: Operator

When number of operators occurs in an expression the operator which is to be evaluated first is judged by applying priority of operators. The arithmetic operators available in C are

+ used for Addition

- used for Subtraction

* used for Multiplication

/ used for Division

by Dinesh Thakur
Category: Operator

The ++ operator is called the increment operator. When the operator is placed *before *the variable (++var), the variable is incremented by 1 before it is used in the expression. When the operator is placed *after *the variable (var++), the expression is evaluated, and then the variable is incremented by 1.

by Dinesh Thakur
Category: Operator

When a division is performed the remainder of the operation is given by modulus operator. The modulus operator is denoted in c by symbol %. Say for instance we have two integer values x and y and then the operation x % y called as x modulus y gives the result as (x- (x / y) * y). Say if x=18 and y =5 the x % y gives value as (18- (18 / 5) * 5) which gives (18-15) which results in 3 in other words the remainder of the division operation.

by Dinesh Thakur
Category: Operator

**}**The operators present in prefix and postfix are

- prefix increment operator denoted by ++
- prefix decrement operator denoted by --
- postfix increment operator
- postfix decrement operator

by Dinesh Thakur
Category: Operator

**Example: **Suppose in byte that has a value 10101101 . We wish to check whether bit number 3 is ON (1) or OFF (0) . Since we want to check the bit number 3, the second operand for AND operation we choose is binary 00001000, which is equal to 8 in decimal.

by Dinesh Thakur
Category: Control Structures

The trapezoidal rule is the simplest method to approximate the definite integral of a function f(x) over the interval [a, b]. Given N equally space points (with a spacing of h) X0, X1, ..., XN such that X0 = a and XN = b, the integral of f(x) can be approximated as the sum

by Dinesh Thakur
Category: Control Structures

C program to encrypt text using one of the simplest ciphers known as the "Caesar cipher." In this encryption scheme, we shift all characters by a given offset. For example, if we use an offset of 4, every occurrence of 'A' will be replaced by 'E', every occurrence of 'B' will be replaced by 'F', and so forth. The encrypted text can be decrypted by using the reverse process if know the offset used for the encryption.

by Dinesh Thakur
Category: Control Structures

The C program computes the rational approximation to a given real number, i.e., given a real number val, the program computes a pair of integers N and D such that the fraction N/D is a good approximation to val. To do so, we use the following series of steps.

by Dinesh Thakur
Category: Control Structures

Perfect numbers are positive integers which have the special property that the sum of all their factors equals the number itself, e.g., 6 = 1+2+3. The C program finds and prints out all perfect numbers less than 1000.

by Dinesh Thakur
Category: Control Structures

The Greatest Common Divisor of two positive integers can be calculated iteratively by the following formula known as Euclid's algorithm. You can see that this is a recursive definition with GCD(m,n) defined in terms of GCD(n,m%n).

by Dinesh Thakur
Category: Control Structures

C program to sum the series 1/1^{2}+1/2^{2}+1/3^{2}

by Dinesh Thakur
Category: Control Structures

1. if income is less thn, 1,50,000 then no tax

2. if taxable income is in the range 1,50,001-300,000 then charge 10% tax

3. if taxable income is in the range 3,00,001-500,000 then charge 20% tax

4. if taxable income is above 5,00,001 then charge 30% tax.

by Dinesh Thakur
Category: Control Structures

Nested *for *loops have many applications, particularly, in programs dealing with sorting of lists, input/output of multi-dimensional arrays, etc. and also in the evaluation of expressions involving more than one parameter. The code for nested/or loops is given below.

by Dinesh Thakur
Category: Control Structures

So far, we have used only one variable in a *for *loop; however, more than one variable with different end values and with different modes of increments/decrements may also be used. In a compound *for *expression, the variables may be separated by a comma as illustrated for *i *and *j *below.

by Dinesh Thakur
Category: Control Structures

In the expression for *for *loop the inclusion of the expressions are optional. However, two semicolons must be included. An endless *for *loop may be written as shown below.

by Dinesh Thakur
Category: Control Structures

The *while *expression may consist of a single expression (as it is generally done in most of the programs); however, we may also use compound conditions or expressions. Multiple expressions may be connected by a comma operator or by Boolean operators. If the expressions are simply connected by comma, it is the last expression that is evaluated. The expressions preceding the last are ignored. In the following *while *expression the first expression, i.e., j <4 is neglected.

About Dinesh Thakur

Dinesh Thakur holds an B.SC (Computer Science), MCSE, MCDBA, CCNA, CCNP, A+, SCJP certifications. Dinesh authors the hugely popular Computer Notes blog. Where he writes how-to guides around Computer fundamental , computer software, Computer programming, and web apps. For any type of query or something that you think is missing, please feel free to Contact us.

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