Prime String | C ++ program to find if string is a Prime or not . ; Function that checks if sum is prime or not ; Corner cases ; This is checked so that we can skip middle five numbers in below loop ; Driver code
#include <bits/stdc++.h> NEW_LINE using namespace std ; bool isPrimeString ( string str ) { int len = str . length ( ) , n = 0 ; for ( int i = 0 ; i < len ; i ++ ) n += ( int ) str [ i ] ; if ( n <= 1 ) return false ; if ( n <= 3 ) return true ; if ( n % 2 == 0 n % 3 == 0 ) return false ; for ( int i = 5 ; i * i <= n ; i = i + 6 ) if ( n % i == 0 || n % ( i + 2 ) == 0 ) return false ; return true ; } int main ( ) { string str = " geekRam " ; if ( isPrimeString ( str ) ) cout << " Yes " << endl ; else cout << " No " << endl ; }