How to use a variable in a string

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I am trying to implement a variable in a string. I have searched for this and tried throwing different things at it but nothing seems to work..

I have a variable that looks like this:


I have no issue getting the value using:

function getQueryVariable(variable) {
                var query =;
                var vars = query.split("&");
                for (var i = 0; i < vars.length; i++) {
                    var pair = vars[i].split("=");
                    if (pair[0] == variable) { return pair[1]; }
                return (false);

            var name = getQueryVariable("name")

Now I have a string that loads a page that looks like this:

 HMI.Builder.init('Files/HMIBuilder/', function () {
                //run code after page/iframe is loaded

What I want to do is add the variable to the string Files/HMIBuilder/{name} This does not work. It needs to end up looking like this


Or whatever variable is passed.

You'll have to concatenate your string with the variable using the javascript + symbol, like below:

HMI.Builder.init('Files/HMIBuilder/' + getQueryVariable("name"), function () {
  //run code after page/iframe is loaded

Or use the handy replace for more readability:

HMI.Builder.init('Files/HMIBuilder/{name}'.replace('{name}', getQueryVariable("name")), function () {
  //run code after page/iframe is loaded

Of course, you could do it with two steps for even more readability:

var route = 'Files/HMIBuilder/{name}'.replace('{name}', getQueryVariable("name"));
HMI.Builder.init(route, function () {
  //run code after page/iframe is loaded

Finally, on recent browsers (and with some transpilers for backward compatibility), you could use the ES6 "`" syntax:

var route = `Files/HMIBuilder/${getQueryVariable("name")}`;
HMI.Builder.init(route, function () {
  //run code after page/iframe is loaded

How do I put a variable inside a string?, String concatenation: plot.savefig('hanning' + str(num) + '.pdf'). Conversion Specifier: plot.savefig('hanning%s.pdf' % num). Using local variable  var string = stringInject("this is a {0} string for {1}", ["test", "stringInject"]); which will replace the {0} and {1} with the array items and return the following string "this is a test string for stringInject" or you could replace placeholders with object keys and values like so:

use a template literal

HMI.Builder.init(`Files/HMIBuilder/${getQueryVariable(variable)}`, function () {

            //run code after page/iframe is loaded

Putting a variable into a string (quote), You should use a string formatter here, or concatenation. For concatenation you'll have to convert an int to a string . You can't concatenate ints  ANSWER: escape them with a backtick `” or use Here-Strings. A Here-String is a string which starts with a @” and ends with a “@ (on a line by itself). Here-Strings can use any character you want until it sees a “@ which terminates the string.

You can get a list of parameters by running the following function

function extractParams(url) {
    new URL(url).search.substr(1).split('&').map(x => {
        var y = x.split('=');
        return { [y[0]]: y[1] };

var params = extractParams('');

Which would print the following

[{id: 151}, {name: "john"}]

Python Programming/Variables and Strings, › Practice › Python › Getting Started › String Python storing a string + variable + string in a variable I have a dilemma where the middle of a file name will change but the beginning and end will remain the same. I am trying to store the final result in a variable but I am confused on how to do this. ips=['','','','10.2

String Tutorials & Notes | Python, How to create a string and assign it to a variable. To create a string, put the sequence of characters inside either single quotes, double quotes, or triple quotes and  Building strings is often done after processing has occurred. Calling functions in the middle of preparing your output it often not what you want. Consider calling the function first, storing the result in a variable and then you can include it in the string echo "like so: $var"; .

Four Ways to Print Variables in Strings - Better Programming, So you have a variable—or three—that you want to include as part of a string. Have no My new default is to use the f-string literal technique. In programming, just like in algebra, we use variables (like price1) to hold values. In programming, just like in algebra, we use variables in expressions (total = price1 + price2). From the example above, you can calculate the total to be 11. JavaScript variables are containers for storing data values.

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