Conditionals

An if statement lets C++ choose between branches.

conditionals.cpp

#include <iostream>
#include <string>

int main() {
    int temperature = ;
    std::string status = "";

    if (temperature >= 80) {
        status = "warm";
    } else {
        status = "comfortable";
    }

    std::cout << "temperature=" << temperature << std::endl;
    std::cout << "status=" << status << std::endl;
    return 0;
}

#include <iostream>
#include <string>

int main() {
    int temperature = ;
    std::string status = "";

    if (temperature >= 80) {
        status = "warm";
    } else {
        status = "comfortable";
    }

    std::cout << "temperature=" << temperature << std::endl;
    std::cout << "status=" << status << std::endl;
    return 0;
}

#include <iostream>
#include <string>

int main() {
    int temperature = ;
    std::string status = "";

    if (temperature >= 80) {
        status = "warm";
    } else {
        status = "comfortable";
    }

    std::cout << "temperature=" << temperature << std::endl;
    std::cout << "status=" << status << std::endl;
    return 0;
}

if statement An `if` statement runs one block when its condition is true and can use `else` for the other case.