Example 2-6. The state of a promise never changes after it is fulfilled or rejected

var promise = new Promise(function (resolve, reject) {
	resolve(Math.PI);
	reject(0); // Does nothing
	resolve(Math.sqrt(-1)); // Does nothing
});

promise.then(function (number) {
	console.log('The number is ' + number);
});

// Console output:
// The number is 3.141592653589793