std::numeric_limits::max() and std::numeric_limits::min() in C++

In this article, we will discuss std::numeric_limits::max() and std::numeric_limits::min() functions with their syntax and examples.

What is std::numeric_limits::max()?

The std::numeric_limits<T>:: max() method returns the largest finite number that can be represented by the numeric type T. All arithmetic types can work for type T.

Header files:

Template:

Syntax:

It has the following syntax:

Parameter: It can receive any single type of data, such as T.

Return Type: Depending on the type T, it returns predefined macros, true, or the default T().

Program 1:

The following program demonstrates the method std::numeric_limits<T>::max().

Filename: MaxLimits.cpp

Output:

bool limit: 1
char limit: 127
unsigned char limit: 255
short limit: 32767
int: 2147483647
unsigned int limit: 4294967295
long long limit: 9223372036854775807
float limit: 3.40282e+38
double limit: 1.79769e+308size_t limit: 18446744073709551615

What is std::numeric_limits::min()?

The std::numeric_limits<T>::min() method returns the smallest finite number that may be represented by the numeric type T. For type T, any limited arithmetic type is valid.

Header File:

Syntax:

It has the following syntax:

Parameter: It can receive any single type of data, such as T.

Return Type: Depending on the type T, it returns established macros, true or default T(). Min results in the smallest positive normalized value for floating-point numbers types with denormalization. For the floating data type, use numeric_limits::lowest() to identify the value that contains no values smaller than it.

Example:

Output:

bool min value: 0
char min value: -128
unsigned char min value: 0
short min value: -32768
int min value: -2147483648
unsigned int min value: 0
long long min value: -9223372036854775808
float: 1.17549e-38
double min value: 2.22507e-308
size_t min value: 0