Fundamental of C Programming (Data Types)
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The document provides an overview of data types in the C programming language, detailing primitive, derived, and user-defined types. Primitive data types include characters, integers, floating points, doubles, and voids, while derived types encompass arrays, pointers, and functions. User-defined data types such as structures, unions, and enumerations allow for custom data structures in C.
Fundamental of C Programming (Data Types)
- 1. Fundamental of C Programming (Data Types) Submitted By: Engr. Jimmy Majumder cover Computer Basic and Programming
- 2. 1 Block Diagram Data types specify how we enter data into our programs and what type of data we enter. C language has some predefined set of data types to handle various kinds of data that we can use in our program. These datatypes have different storage capacities.
- 3. 2 Primitive Data Types in C In computer science, a primitive is a fundamental data type that cannot be broken down into a more simple data type. 1. character(char) : a character is a single visual object used to represent text, numbers, or symbols. Here, the letter "A" is a single character. With a computer, one character is equal to one byte, which is 8 bits. 2. integer(int): An integer is a datum of integral data type, Integral data types may be of different sizes and may or may not be allowed to contain negative values. 3. floating point(float): This data type built into the compiler that's used to define numeric values with floating decimal points. The float data type stores double- precision floating-point numbers with up to 17 significant digits. FLOAT corresponds to IEEE 4-byte floating-point, and to the double data type in C. 4. double : The double data type is also numeric values, double-precision 64-bit IEEE 754 floating point. Its range of values is beyond the scope of this discussion, but is specified in the Floating-Point Types, 5. void: void is used as a function return type, it indicates that the function does not return a value.
- 4. 3 Derivied Data Types in C In computer science, those data types which are derived from the fundamental data types are called derived data types. 1. array : An array is a collection of data items, all of the same type, accessed using a common name. A one-dimensional array is like a list; A two dimensional array is like a table; The C language places no limits on the number of dimensions in an array, though specific implementations may. 2. pointer: A pointer is a variable whose value is the address of another variable, i.e., direct address of the memory location. Like any variable or constant, you must declare a pointer before using it to store any variable address. 1. function: A function is a block of statements that performs a specific task. Let's say you are writing a C program and you need to perform a same task in that program more than once. In such case you have two options: a) Use the same set of statements every time you want to perform the task.
- 5. 4 User Defined Data Types in C In computer science, Those data types which are defined by the user as per his/her will are called user-defined data types. Examples of such data types are structure, union and enumeration. 1. enum : An enumerated type (also called enumeration, enum, or factor in the R programming language, and a categorical variable in statistics) is a data type consisting of a set of named values called elements, members, enumeral, or enumerators of the type. 2. Structure: A structure creates a data type that can be used to group items of possibly different types into a single type. 3. union: A union is a special data type available in C that allows to store different data types in the same memory location. You can define a union with many members, but only one member can contain a value at any given time. Unions provide an efficient way of using the same memory location for multiple-purpose.
- 6. 5 Data Types Summary in C A code has developed using a code compiler software Thank You !