Checking a number is a string and converting it.

[zombie lad]

I'm making a basic text adventure and am wondering if this code i've made is the best way to check if a string is an integer and then convert it if is or not if it isn't?

try{   
	int_input = stoi(string_input);
	number = true;
}
catch (invalid_argument){
	number = false;
}