I want to create operator in string and show the value as int.
// ex:
val str= "1+2*3" , print out -> "1+2*3"
// i want:
print out -> 7
however i tried to create kotlin code like:
val str= "${1+2*3}" or val str= "1+2*3".toInt
but all this don't work.
any help???
You need to have some kind of parsers to achieve that.
Few examples
The advantage with the above is that you can perform any kind of calculation like below.
Expression e = new Expression("( 2 + 3/4 + sin(pi) )/2");
double v = e.calculate()
Or by using the Java inbuilt Scriptengine.
ScriptEngineManager mgr = new ScriptEngineManager();
ScriptEngine engine = mgr.getEngineByName("JavaScript");
String foo = "1+2*3";
System.out.println(engine.eval(foo)); //prints 7
