There are several different ways to store data in C, and they are all unique from each other. The types of data that information can be stored as are called data types. C is much less forgiving about data types than other languages. As a result, it’s important to make sure that you understand the existing data types, their abilities, and their limitations. Show
One quirk of C’s data types is that they depend entirely on the hardware that you’re running your code on. An There are two categories that we can break this into: integers, and floating point numbers. Integers are whole numbers. They can be positive, negative, or zero. Numbers like -321, 497, 19345, and -976812 are all perfectly valid integers, but 4.5 is not because 4.5 is not a whole number. Floating point numbers are numbers with a decimal. Like integers, -321, 497, 19345, and -976812 are all valid, but now 4.5, 0.0004, -324.984, and other non-whole numbers are valid too. C allows us to choose between several different options with our data types because they are all stored in different ways on the computer. As a result, it is important to be aware of the abilities and limitations of each data type to choose the most appropriate one. Integer data typesCharacters: char
The actual size, like all other data types in C, depends on the hardware you’re working on. By minimum, it is at least 8 bits, so you will have at least 0 to 127. Alternatively, you can use Standard Integers: intThe amount of memory that a single Like all of these other data types, there is an 2 variant that can be used. The 3 can be positive and zero but not negative, so it can store values from 0 to 65,535, or more depending on hardware.Short integers: Hello World!Hello! I am a character. My value is G and my size is 1 byte. Hello! I am an integer. My value is 1 and my size is 4 bytes. Hello! I am a double floating point variable. My value is 3.140000 and my size is 8 bytes. Bye! See you soon. :)4This doesn’t get used often, but it’s good to know that it exists. Like int, it can store -32768 to 32767. Unlike int, however, this is the extent of its ability. Anywhere you can use 4, you can use int .Longer integers: Hello World!Hello! I am a character. My value is G and my size is 1 byte. Hello! I am an integer. My value is 1 and my size is 4 bytes. Hello! I am a double floating point variable. My value is 3.140000 and my size is 8 bytes. Bye! See you soon. :)7The 7 data type stores integers like int , but gives a wider range of values at the cost of taking more memory. Long stores at least 32 bits, giving it a range of -2,147,483,648 to 2,147,483,647. Alternatively, use int 0 for a range of 0 to 4,294,967,295.Even longer integers: int1The Floating point number data typesBasic Floating point numbers: int4
Doubles: int6
Getting a wider range of doubles: int8
Picking the right data typeC makes pick the data type, and makes us be very specific and intentional about the way that we do this. This gives you a lot of power over your code, but it’s important to pick the right one. In general, you should pick the minimum for your task. If you know you’ll be counting from integer 1 to 10, you don’t need a long and you don’t need a double. If you know that you will never have negative values, look into using the 2 variants of the data types. By providing this functionality rather than doing it automatically, C is able to produce very light and efficient code. However, it’s up to you as the programmer to understand the abilities and limitations, and choose accordingly.We can use the sizeof() operator to check the size of a variable. See the following C program for the usage of the various data types:
Output:
The Void typeThe void type specifies that no value is available. It is used in three kinds of situations: 1. Function returns as voidThere are various functions in C which do not return any value or you can say they return void. A function with no return value has the return type as void. For example, 2. Function arguments as voidThere are various functions in C which do not accept any parameter. A function with no parameter can accept a void. For example, 3. Pointers to voidA pointer of type void * represents the address of an object, but not its type. For example, a memory allocation function ADVERTISEMENT ADVERTISEMENT ADVERTISEMENT ADVERTISEMENT ADVERTISEMENT ADVERTISEMENT ADVERTISEMENT If this article was helpful, tweet it. Learn to code for free. freeCodeCamp's open source curriculum has helped more than 40,000 people get jobs as developers. Get started What data type is a number which can be a fraction?Rational numbers: Rational numbers are the numbers that can be expressed as the ratio of two integers. It includes all the integers and can be expressed in terms of fractions or decimals.
Which data type has to be used for variables containing fractional numeric values?Floating-point variables hold values that have a fractional part (that is, real numbers).
Which data type of variable holds integer value?The long data type stores integers like int , but gives a wider range of values at the cost of taking more memory. Long stores at least 32 bits, giving it a range of -2,147,483,648 to 2,147,483,647.
What are the 4 integer data types?Integer Data Types.. • tinyint (one-byte). • smallint (two-byte). • integer (four-byte). • bigint (eight-byte). |