Range of Int in CIn this article, we are going to discuss the range of int in C with programs. Range of IntData types, and their size and range, play an important role in C programming. The sizeof() operator gives the number of bytes required to store a value in memory of a specific form. However, to prevent overflow and underflow errors in programming, we must be aware of a type's range. C specifies the exact minimum storage size for each integer form. For example, short requires at least two bytes, and long requires at least four bytes. The compiler determines the size and range of a data type. As a result, we should not hardcode the size and range values in the program. Find a range of data types manually without a C libraryThe given formula defines the minimum and maximum range of a signed type:
The given formula defines the minimum and maximum range of an unsigned type:
Examples: Let's take an example to find the range of integers in C programming. Output: After executing this code, we will get the output as shown below: Range of int = -2147483648 to 2147483647 Range of unsigned int = 0 to 4294967295 Range of char = -128 to 127 Range of unsigned char = 0 to 255 Range of long = -9223372036854775808 to 9223372036854775807 Range of unsigned long = 0 to 18446744073709551615 Range of short = -32768 to 32767 Range of unsigned short = 0 to 65535 Range of long long = -9223372036854775808 to 9223372036854775807 Range of unsigned long long = 0 to 18446744073709551615 Find the range of data types using a C libraryThe method described above for obtaining any form of the range is interesting, but it is not recommended for use. Using the power of a pre-defined C library is often recommended. Limits.h and float.h are two header files in C programming that define minimum and maximum constants. limits.h specifies constants for integer type and character types. Small and maximum size ranges, total bits, and many others. The float.h defines the floating-point numbers. Example: Now, let's take an example to understand how we can find the range of integers by using the C library. Output: After executing this above code, we will get the output as shown below: The output is: Range of signed int -2147483648 to 2147483647 Range of unsigned int 0 to 4294967295 Range of signed char -128 to 127 Range of unsigned char 0 to 255 Range of signed long int -9223372036854775808 to 9223372036854775807 Range of unsigned long int 0 to 18446744073709551615 Range of signed short int -32768 to 32767 Range of unsigned short int 0 to 65535 Range of float 1.175494e-38 to 3.402823e+38 Range of double 2.225074e-308 to 1.797693e+308 Range of long double 3.362103e-4932 to 1.189731e+4932 Example: Write a program that reads an integer type and checks it against the given range to see where it belongs. Output: After executing this above code, we will get the output as shown below: The Output is: Input an integer: 28 Range [26,50] Example: The sizeof() operator is used to determine the size of an integer form or some other type. The given below program shows how to use the sizeof() operator to determine the sizes of various integer types in the system. Output: After executing this above code, we will get the output as shown below: The output is: sizeof(short) = 2 bytes sizeof(int) = 4 bytes sizeof(unsigned int) = 4 bytes sizeof(long) = 8 bytes |