Variables are a way of reserving memory to hold some data and assign names to them so that we don’t have to remember the numbers like 316976 and instead we can use the memory location by simply referring to the variable name. Every variable is mapped to a unique memory address. However, this is not … Read more
A Variable represents some memory location which is used to store some value. Unlike constants, a variable may take different values at during times during execution. In other words, the value within a variable can be changed; hence the name. A Variable-name is an identifier token that follows the syntax rules for creating identifier, however … Read more
Constants are those tokens in C language whose value is fixed and does not change during the execution of a program. There are various types of constants in C. Integer Constants These constants refer to a sequence of digits. Any representation can be used to specify an integer constant. Table -1 shows ways to specify … Read more
Identifiers are user-defined tokens used to name variables, functions, etc. An identifier consists of a sequence of letters and digits. Underscore is also used. However, the first character of the identifier should a letter or an underscore. Though there is logically no restriction on the length of the number of characters in an identifier, however … Read more
Keywords are those tokens or words whose meaning are already defined within the C language and cannot be changed. As an analogy, in English language the meaning of verbs, adjectives, common nouns, and so on is pre-defined and can’t be changed. These tokens of English language are its keywords. Similarly, in C language some tokens … Read more
In C language the smallest unit of a program is called Token. Tokens are created using the C character set. These tokens are delimited from each other by white spaces just like words in English language are delimited by white spaces. The Syntax Rule of the C language dictates how to create tokens in C … Read more
The character set of C comprises of wide range of symbols that can be used to create tokens. These symbols are available on all modern personal computers. These characters can be grouped into following categories: 1. Letters 2. Digits 3. Special Characters 4. White Spaces Table – 1 shows the complete set of characters supported … Read more
Though C language has rich set of features and have enormous advantages, however it suffers from some disadvantages. These include: 1. C does not have OOPS feature. 2. There is no runtime checking in C language. 3. There is no strict type checking. 4. C doesn’t have the concept of namespace. 5. C imposes few … Read more
C language has in-numerous advantages. The important advantages of C language are described as follows: 1. Easy to Understand: C language is a structured programming language. The program written in C language is easy to understand and modify. 2. Middle Level Language: C language has combined features of low level language (such as assembly language) … Read more
C language has a rich set of features. These include: 1. There are a small, fixed number of keywords, including a full set of control flow primitives. This means there is not much vocabulary to learn. 2. C is a powerful, flexible language that provides fast program execution and imposes few constraints on the programmer. … Read more