To find numerator in fraction form of given number . For example , for 30.25 , numerator would be 3025.
$ num = 0 ; for ( $ i = 0 ; $ i < $ n ; $ i ++ ) { if ( $ str [ $ i ] != ' . ' ) { $ num = $ num * 10 + ( $ str [ $ i ] - '0' ) ; if ( $ dot_seen == true ) $ count_after_dot ++ ; } else $ dot_seen = true ; }