Why only condition is working for "if" condition?

Mohit Tripathi

Hi,

I am trying to set the range of integers using Validator and showing the notification message if integer is not within the range. But, I can see that only one condition is working in "if" condition for "data2", not for "data3". I have checked for multiple datas but it is working for only one condtion. Can I know why?


    int data2 = ui->lineEdit9_11->text().toInt();
    int data3 = ui->lineEdit10_11->text().toInt();

    qDebug()<<data2;
    qDebug()<<data3;
    if(((data2<50||data2>100)&&(data3<0||data3>40) ))
    {
        QMessageBox msg;
        msg.setText("Range should be 50 to 100\n"
                    "Range should be 0 to 40\n");
        msg.exec();
        return;
    }

J.Hilk

@Mohit-Tripathi

change your && to an ||,
otherwise you only enter the if branch when both, data2 and data3 are out of range

currently:
data2 = true && data3 == false -> does not enter
data2 = false && data3 == true -> does not enter
data2 = false && data3 == false -> does not enter
data2 = true && data3 == true -> does enter

KroMignon

@Mohit-Tripathi said in Why only condition is working for "if" condition?:

Can I know why?

This is simple Boolean algebra:

False && False ==> False
False && True  ==> False
True  && False ==> False
True  && True  ==> True

False || False ==> False
False || True  ==> True
True  || False ==> True
True  || True  ==> True