The value of root 2 is 1.414. the number 2 is not a perfect square so its square root can't be expressed in a whole number. That's why the square root of all imperfect squares result in decimal numbers. However we cannot determine the exact value of square root of 2. If we keep on taking out the square root of 2 when the value will reach to infinite. It will be like this 1.41421 356 237 309 504 880 16887 2420 9698........