C Programming

Character Test Functions:  In the following table the required functions and their tests are given. Function Test isalnum(c) Is c an alphanumeric character? isalpha(c) Is c an alphabetic character? isdigit(c) Is c a digit? islower(c) Is c a lower case letter? isprint(c) Is c a printable character? ispunct(c) Is c a punctuation mark? isspace(c) Is … Read more

Input & output operations:  The operations which took place in order to take data and make the display of the processed information are known as input & output operations. Management of input & output operations:  In C language, in general, user use scanf and printf functions for input and output purpose respectively. scanf can be used … Read more

Rules for ++ and – operators:  Following are the rules for the increment (++) and decrement (–) operators. Increment (++) and decrement (–) operators are unary operators and they require variable as their operands. When postfix ++ (or –) is used with a variable in an expression, the expression is evaluated first using the original … Read more

Arithmetic operators:  The arithmetic operators are +, -, *, /. They work the same way as they do in other languages. There are three types of arithmetic operators which are as follows, . Integer arithmetic:  Here operands are integer. For a=14 and b=4,                                   a … Read more

Operator:  An operator is a symbol that tells the computer to perform certain mathematical and logical manipulations. Operators are used in programs to manipulate data and variables. Such as, ++, –, <, > etc. Categories of operators:  C operators can be classified into a number of categories. They are as follows, Arithmetic operators Logical operators … Read more

Data types: C language is rich in its data types. ANSI supports three classes of data types. Primary or fundamental data types. Derived data types. User-defined data types. All C compilers support five fundamental data types. Namely, integer (int), character (char), floating point (float), double-precision floating point (double) and void. They are described below.             Integer types: Integer are whole … Read more

Variables:  A variable is a data name that may be used to store data value. A variable may take different value at different times during execution. Some examples are, average, height, class_strength. Conditions for variables:  Variable names may consist of letters, digits and the underscore character, subject to the following conditions. Must consist of only letters, … Read more