Why is angular.isNumber() not working as expected?

Question

It appears as if AngularJS\'s angular.isNumber is not working. It doesn\'t work with strings that are numbers. Am I doing something wrong? Should I just use

Answer 1

Use it as below,

angular.isNumber(eval('99.55'))

for other expressions also we may use eval(input).

Note: eval() is a javascript method

Edit: It is not recommended to use eval(), as document says Never use eval()!

Thanks @Diogo Kollross