INT_MAX and INT_MIN in C/C++ and Applications
Most of the time, in competitive programming, there is a need to assign the variable, the maximum or minimum value that data type can hold, but remembering such a large and precise number comes out to be a difficult job. Therefore, C++ has certain macros to represent these numbers, so that these can be directly assigned to the variable without actually typing the whole number.
Depending upon the compiler and C++ standard, you may be required to include the header file <limits.h> or <climits> in your C or C++ source code respectively. So it is advisable to include this header file for using the INT_MAX, INT_MIN macros. For further reading on this header file, refer to this article.
INT_MAX is a macro that specifies that an integer variable cannot store any value beyond this limit.
INT_MIN specifies that an integer variable cannot store any value below this limit.
Values of INT_MAX and INT_MIN may vary from compiler to compiler. Following are typical values in a compiler where integers are stored using 32 bits. Value of INT_MAX is +2147483647. Value of INT_MIN is -2147483648.
Applications of INT_MAX and INT_MIN :
1. Check for Integer overflow :
Similarly, we can check for overflow while subtracting 2 numbers using INT_MIN.
2. Computing MIN in an array with large elements
We usually assign a high value to MIN to compute minimum value in an array. But if an array has large elements, we must assign the highest possible value to the array.
Below is the C++ implementation :
Similarly, MAX can be found in an array of large numbers using INT_MIN.
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