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C++ String swap()This function is used to exchange the values of two string objects. SyntaxConsider two strings s1 and s2 , we want to exchange the values of these two string objects. Its syntax would be : s1.swap(s2) ParametersIt contains single parameter, whose value is to be exchanged with that of the string object. Return valueIt does not return any value. Example 1#include<iostream> using namespace std; int main() { string r = "10"; string m = "20" cout<<"Before swap r contains " << r <<"rupees"<<'\n'; cout<<"Before swap m contains " << m <<"rupees"<<'\n'; r.swap(m); cout<< "After swap r contains " << r<<"rupees"<<'\n'; cout<< "After swap m contains " << m<<"rupees"; return 0; } Output: Before swap r contains 10 rupees Before swap m contains 20 rupees After swap r contains 20 rupees After swap m contains 10 rupees In this example, r and m are two string objects containing 10 and 20 rupees respectively. We swap there values by using swap function. After swapping, r contains 20 rupees and m contains 10 rupees.
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