Happy Numbers

Happy Numbers

About Happy Numbers

A number is called happy if it leads to 1 after a sequence of steps where in each step number is replaced by sum of squares of its digit that is if we start with Happy Number and keep replacing it with digits square sum, we reach 1.

A number will not be a Happy Number when it makes a loop in its sequence that is it touches a number in sequence which already been touched. So to check whether a number is happy or not, we can keep a set, if same number occurs again we flag result as not happy.

Example

Input : num = 19
Output : True
19 is a Happy Number,
1^2 + 9^2 = 82
8^2 + 2^2 = 68
6^2 + 8^2 = 100
1^2 + 0^2 + 0^2 = 1
As we reached to 1, 19 is a Happy Number.

Input : num = 20
Output : False
20 is not a Happy Number

Check If Happy Number Of Not

Result Will Appear Here

Find Happy Number From A Given Range

Enter The Range Of Numbers :

Result Will Be Displayed Below

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Happy Numbers

About Happy Numbers

Example

Check If Happy Number Of Not

Find Happy Number From A Given Range

Enter The Range Of Numbers :

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