Write a program in JAVA to check whether a number is a happy number or not.

Question

a happy number is one in which the sum of the square of the digits is equal to 1.

Answer 1

@blackcat that is true, I did not think of that

Answer 2

Looks like the only happy number is 1

Answer 3

@Yerucham By @Alok Agarwal's definition, all powers of ten greater than one are happy too.