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Showing content from https://www.tutorialspoint.com/cpp_standard_library/cpp_functional_less_equal.htm below:

C++ Functional Less_Equal

It is a function object class for less-than-or-equal-to comparison and binary function object class whose call returns whether the its first argument compares less than or equal to the second (as returned by operator <=).

Following is the declaration for std::less_equal.

template <class T> struct less_equal;

template <class T> struct less_equal;

T − It is a type of the arguments and return type of the functional call.

none

noexcep − It doesn't throw any exceptions.

In below example explains about std::less_equal.

#include <iostream>
#include <functional>
#include <algorithm>

int main () {
   int numbers[]={250,500,70,100,125};
   int cx = std::count_if (numbers, numbers+5, std::bind2nd(std::less_equal<int>(),100));
   std::cout << "There are " << cx << " elements lower than or equal to 100.\n";
   return 0;
}

Let us compile and run the above program, this will produce the following result −

There are 2 elements lower than or equal to 100

functional.htm

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