Question

so say if i had a string like “3+3-1*2/3=”
how would i go through the string looking at each character and if its a number turn it to a double then if not turn it to a char??

Answer 1

You can traverse through the String using a loop. For example:

for(int i = 0; i < mystring.length(); i++) {
    char character = mystring.charAt(i);
    // do stuff with character
}

You can check if it is a decimal character by using Character.isDigit(char).

You can convert a string to an integer using parseInt().