How can I parse String to Int in an Angular expression?

I prefer to use an angular filter.

app.filter('num', function() {
    return function(input) {
      return parseInt(input, 10);
    };
});

then you can use this in the dom:

{{'10'|num}}

Here is a fiddle.

Hope this helped!

You can try:

{{ 1 * num_str + 1 }}

http://jsfiddle.net/Z32fP/

In your controller:

$scope.num_str = parseInt(num_str, 10);  // parseInt with radix

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