making less than and greater than work

can i do something like this

if( pollutant < 3.4)
{ cout << " u passed " << endl;
}

else
{
cout << "u failed " << endl;
}

of course the pollutant would have already been inputed. the main question is whether or not using characters up agains numbers will work correctly. thanks for ur help in advance.

thats fine, as long as pollutant is defined and has a numeric value you can use < and >
you can also use
=>
=<

thanks

You want to declare pollutant as a double or float, like:
double pollutant;