Myapp.filter (‘name of filter’, function () {
	return function (input, optparameter1, optparameter2)
	{
		var out;
		//code for the implementation of custom filter can be put here
		return out;
	}
})
Myapp.filter('toUpperCase', function () {
return function (in)
    {
        var out = "";       
        out = in.toUpperCase();
        return out;
    }
})
Myapp.controller("Product Controller", function ($scope) { 
    $scope.products = [
        { 'name': 'pencil', 'price': '250' },
        { 'name': 'pen', 'price': '300' },
        { 'name': 'book', 'price': '3400' },
        { 'name': 'sharpener', 'price': '100' },
        { 'name': 'bat', 'price': '7000' },
   ];
})
Myapp.filter('toPositionUpperCase', function () {
    return function (in,position)
    {
        var out = [];       
        var CapLetter = in.charAt(position).toUpperCase();
        for (var j = 0; j < in.length; j++) {
            if (j == position) {
                out.push(CapLetter);
            } else {
                out.push(input[j]);
            }
        }
        out = out.join('');
        return out;
    }  })
Myapp.filter('priceGreaterThan', function () {
    return function (in, price) {
        var out = [];
        if (isNaN(price)) {
            out = in;
        }
        else {
            angular.forEach(in, function (item) {
                if (item.price > price) {
                    out.push(item)
                }
            });
        }
        return out;
    }
})
<h1>With Custom Filter Implementation</h1>
<div ng-controller="Product Controller">
<input type="number" class="form-control" placeholder="Search here" ng-model="priceterm" /> 
<br/>
<table class="table">
<tr ng-repeat="b in products|priceGreaterThan:priceterm">
<td>{{b.name}}</td>
<td>{{b.price}}</td>
</tr>
</table>
</div>