boost::algorithm::none_of() in C++ library Last Updated : 30 May, 2019 Comments Improve Suggest changes Like Article Like Report The none_of() function in C++ boost library is found under the header 'boost/algorithm/cxx11/none_of.hpp' which tests all the elements of a sequence and returns true if all of them do not share a property. It takes a sequence and a predicate, and returns true if the predicate returns false when applied to every element in the sequence. Syntax: bool none_of ( InputIterator first, InputIterator last, Predicate p ) or bool none_of ( const Range &R, Predicate p) Parameters: The function accepts parameters as described below: first: It specifies the input iterators to the initial positions in a sequence. second: It specifies the input iterators to the final positions in a sequence. p: It specifies a unary predicate function that accepts an element and returns a bool. R: It is the complete sequence. Return Value: The function returns true if the given predicate is false for all the elements of the sequence, else it returns false. Below is the implementation of the above approach: Program-1: CPP // C++ program to implement the // above mentioned function #include <bits/stdc++.h> #include <boost/algorithm/cxx11/none_of.hpp> using namespace std; // using boost::algorithm; // Predicate function to check if // the element is odd or not bool isOdd(int i) { return i % 2 == 1; } // Drivers code int main() { // Declares the sequence with // 5 length and none elements as 1 // [1, 1, 1, 1, 1] vector<int> c(5, 1); // Run the function with second syntax bool ans = boost::algorithm::none_of(c, isOdd); // Condition to check if (ans == 1) cout << "all are not odd"; else cout << "all are odd"; return 0; } Output: all are odd Program-2: CPP // C++ program to implement the // above mentioned function #include <bits/stdc++.h> #include <boost/algorithm/cxx11/none_of.hpp> using namespace std; // using boost::algorithm; // Predicate function to check if // the elements are less than 7 or not bool noneLessThanSeven(int i) { return i < 7; } // Drivers code int main() { // Declares the sequence int a[] = { 1, 2, 5, 6 }; // Run the function with first syntax bool ans = boost::algorithm::none_of(a, a + 4, noneLessThanSeven); // Condition to check if (ans == 1) cout << "all greater than 7"; else cout << "all smaller than 7"; return 0; } Output: all smaller than 7 Reference: https://www.boost.org/doc/libs/1_70_0/libs/algorithm/doc/html/the_boost_algorithm_library/CXX11/none_of.html Comment More infoAdvertise with us Next Article boost::algorithm::none_of() in C++ library G gopaldave Follow Improve Article Tags : C++ CPP-Functions cpp-boost Practice Tags : CPP Similar Reads boost::algorithm::none_of_equal() in C++ library The none_of_equal() function in C++ boost library is found under the header 'boost/algorithm/cxx11/none_of.hpp' which tests all the elements of a sequence against the value passed in the parameter and returns true if all the elements of the sequence are not equal to the value passed. It takes a sequ 2 min read boost::algorithm::one_of() in C++ library The one_of() function in C++ boost library is found under the header 'boost/algorithm/cxx11/one_of.hpp' which tests the elements of a sequence and returns true if exactly one of the element share the property given. It takes a sequence and a predicate, and returns true if the predicate returns true 2 min read boost::algorithm::any_of() in C++ library The any_of() function in C++ boost library is found under the header 'boost/algorithm/cxx11/any_of.hpp' which tests the elements of a sequence and returns true if they any of the elements share the property given. It takes a sequence and a predicate, and returns true if the predicate returns true fo 2 min read boost::algorithm::all_of() in C++ library The all_of() function in C++ boost library is found under the header 'boost/algorithm/cxx11/all_of.hpp' which tests all the elements of a sequence and returns true if they all share a property. It takes a sequence and a predicate, and returns true if the predicate returns true when applied to every 2 min read boost::algorithm::is_sorted() in C++ library The is_sorted() function in C++ boost library is found under the header 'boost/algorithm/cxx11/is_sorted.hpp' which tests if the given sequence is sorted or not according to some given criteria which is specified in the predicate. If no comparison predicate is specified, then std::less is used to se 2 min read Like