Two Pointer(java);

This content originally appeared on DEV Community and was authored by Vasanth S

In Two pointer topic today i have completed the task of finding the happy number in java.

//happy number

public class happy_num {
static boolean happy(int a){

    if(a==1){
        return true;
    }
    else{
        return isHappy(a);
    }
}
public static boolean isHappy(int n) {
    if(n<7 && n>1){//2 
        return false;
    }
    int result=0;
    while(n>0){
        int l=n%10;//rem 
        result+=l*l;//82
        n=n/10;

    }
    if(result==1){
        return true;
    }
    else {
        return happy(result);
    }

}

public static void main(String args[]){
int num=5;
boolean res =isHappy(num);
System.out.println(res);
}

In the above program to find the logic and use recursion technique;

This content originally appeared on DEV Community and was authored by Vasanth S

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