JSInt is an interactive JavaScript console. It may be useful to perform mathematical calculations or for learning JavaScript.For example, you can try entering following statements ( user input is prefixed with > here ): > x = 1010> x = x / 5 2> Math.sin(Math.PI / x)1> f = function(x) { return x^2 + 3*x + 5}f = function(x) { return x^2 + 3*x + 5}> f(x) 15JSInt uses JavaScriptCore Open Source library which implements JavaScript 1.5 / ECMA-262 3rd edition.