How do you convert a String to a float or int?

Question

In an Arduino program I\'m working on the GPS sends the coordinates to the arduino through USB. Because of this, the incoming coordinates are stored as Strings. Is there any way

Answer 1

Convert String to Long in Arduino IDE:

    //stringToLong.h

    long stringToLong(String value) {
        long outLong=0;
        long inLong=1;
        int c = 0;
        int idx=value.length()-1;
        for(int i=0;i<=idx;i++){

            c=(int)value[idx-i];
            outLong+=inLong*(c-48);
            inLong*=10;
        }

        return outLong;
    }