For more information about the restrictions of the sizes of each type, see Built-in types. The range of enumerated types varies depending on the language context and specified compiler flags.
For more information, see C Enumeration Declarations and Enumerations. Keywords Built-in types. Feedback will be sent to Microsoft: By pressing the submit button, your feedback will be used to improve Microsoft products and services. If this article was helpful, tweet it. Learn to code for free. Get started. Forum Donate. Data Types in C There are several different ways to store data in C, and they are all unique from each other.
Integer data types Characters: char char holds characters- things like letters, punctuation, and spaces. Standard Integers: int The amount of memory that a single int takes depends on the hardware.
Longer integers: long The long data type stores integers like int , but gives a wider range of values at the cost of taking more memory. Even longer integers: long long The long long data type is overkill for just about every application, but C will let you use it anyway.
Floating point number data types Basic Floating point numbers: float float takes at least 32 bits to store, but gives us 6 decimal places from 1. Doubles: double double takes double the memory of float so at least 64 bits. Getting a wider range of doubles: long double long double takes at least 80 bits. Picking the right data type C makes pick the data type, and makes us be very specific and intentional about the way that we do this. I am a character.
I am an integer. I am a double floating point variable. This is used when int is not large enough to store the value. Note that you should end the value with an "L":.
You should use a floating point type whenever you need a number with a decimal, such as 9. The float data type can store fractional numbers from 3. Note that you should end the value with an "f":. The double data type can store fractional numbers from 1. Note that you should end the value with a "d":. The precision of a floating point value indicates how many digits the value can have after the decimal point.
The precision of float is only six or seven decimal digits, while double variables have a precision of about 15 digits. Therefore it is safer to use double for most calculations. A boolean data type is declared with the boolean keyword and can only take the values true or false :. Boolean values are mostly used for conditional testing, which you will learn more about in a later chapter.
The char data type is used to store a single character. Collectives on Stack Overflow. Learn more. Asked 11 years, 11 months ago. Active 4 months ago. Viewed k times. Improve this question. Add a comment. Active Oldest Votes. The minimum ranges you can rely on are: short int and int : , to 32, unsigned short int and unsigned int : 0 to 65, long int : -2,,, to 2,,, unsigned long int : 0 to 4,,, This means that no, long int cannot be relied upon to store any 10 digit number.
The minimum range for this type, if your compiler supports it, is: long long int : -9,,,,,, to 9,,,,,, unsigned long long int : 0 to 18,,,,,, So that type will be big enough again, if you have it available. Improve this answer. I realized that int means long int. Take for example eight bits 1 byte The right most bit number when set to 1 represents 2 0 , the next bit 2 1 , then 2 2 and so on until we get to the left most bit which if the number is unsigned represents 2 7.
Yacoby Yacoby 52k 12 12 gold badges silver badges bronze badges. Minimum sizes for the integer type are mandated by the relevant standards although exact sizes are not.
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