The functions which fall in this category just provide bare bone functionality to read and write a character or string from or to the standard input or output respectively. There are four main functions within this category. gets() gets reads characters from keyboard and stores them as a string into the argument until a newline … Read more
The functions which fall in this category provide a convenient way to format the input and/or output data as per the requirements. The two main functions within this category are printf() and scanf(). printf() printf() function writes to the standard output (monitor) a sequence of data, formatted as per the format specifier. The general syntax … Read more
Input/output is used for interfacing with outside world. Every programming language must provide a means to input some data into a program. This can be achieved by reading some input device, file, network, and so on. Similarly, every programming language must provide a means to output some data of a program onto screen, printer, file, … Read more
A Statement is the smallest standalone element of a programming language which in itself is collection of tokens of the language put in some proper sequence as per the syntax rules or grammar of the language. A sequence of one or more statements gives rise to a program. C language makes a distinction between statements … Read more
Error is a condition either during compilation or execution of a program which if not fixed can halt compilation or execution. There are three types of errors — syntax, logical, and run-time errors. Syntax Error These errors occur because of wrongly typed statements, which are not according to the syntax or grammatical rules of the … Read more
C is a case sensitive programming language which means in C two variables named x and X will have different meanings. However, it is a free-form language which means any C statement can start in any column but end of each C statement must be marked with a semicolon (;). In addition, multiple statements can … Read more
C language allows a programmer to create user defined data types. It provides 2 keywords to do so; typedef and enum. typedef typedef allows a programmer to define an identifier that would represent an existing data type. Therefore, the identifier so defined can be later used to declare variables. The general syntax to do so … Read more
After a variable is declared it may be required to initialize it. Initialization of a variable means assigning some value to it. However, technically there is no problem with using a variable without initializing it. But logically it is wrong. When a variable is declared but not initialized it contains some random bogus but valid … Read more
All the variables that are to be used in a program must be declared first. The declaration of variable means specifying the identifier (i.e. variable name), the type and width of data it will hold (i.e. data type) to the compiler. The general syntax of declaring a variable in C is as follows: Also, multiple … Read more
The Character data type is used to specify a variable that will contain characters from ASCII table like ‘A’, ‘%’, and so on. The keyword used by C language to specify some variable as character is char. The width of memory allocated to a character variable is 8 bits. The char variable stores the character … Read more