javascriptjqueryalert

How to show multiple variables in one alert?

Alert command assumes this structure:

alert(variable)

How to show multiple variables in a single alert?

Solution

  • Alert command assumes this structure: alert (variable)

    No, alert() assumes this structure:

        alert(some expression)

    ...where "some expression" is pretty much any JavaScript expression - if the expression is not a string it will be converted (though in some cases, e.g., for some objects the result might not be very meaningful).

    So:

    alert(variable);
alert("string literal");
alert(variable1 + variable2 + variable3);
alert(variable1 + ", " + variable2);
alert(resultOfFunctionCall());
alert([1,2,3]);
alert(whatever() + "else" + you.can.think + "of");

    Or even:

    alert();   // displays "undefined"

    Note that if you are trying to debug your code you are better off using console.log() than alert(). If you are trying to produce a dynamic message to show the user just concatenate variables as needed, e.g.:

    alert("Hello there " + name + ". Welcome.");