31 lines
609 B
JavaScript
31 lines
609 B
JavaScript
|
function happy_number(num)
|
||
|
|
{
|
||
|
|
var m, n ;
|
||
|
|
var c = [] ;
|
||
|
|
|
||
|
|
while(num != 1 && c[num] !== true)
|
||
|
|
{
|
||
|
|
c[num] = true ;
|
||
|
|
m = 0 ;
|
||
|
|
while (num > 0) {
|
||
|
|
n = num % 10 ;
|
||
|
|
m += n * n ;
|
||
|
|
num = (num - n) / 10 ;
|
||
|
|
}
|
||
|
|
num = m ;
|
||
|
|
}
|
||
|
|
return (num == 1) ;
|
||
|
|
}
|
||
|
|
|
||
|
|
var cnt = 5;
|
||
|
|
var num = 1;
|
||
|
|
var f5 = '';
|
||
|
|
while(cnt-- > 0)
|
||
|
|
{
|
||
|
|
while(!happy_number(num))
|
||
|
|
num++ ;
|
||
|
|
f5 = f5+(num + ", ") ;
|
||
|
|
|
||
|
|
num++ ;
|
||
|
|
}
|
||
|
|
console.log('First 5 happy numbers are : '+f5);
|