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arduino voltmeter

+int analogInput = 1;
+float Vout = 0.00;
+float Vin = 0.00;
+float I = 0.00;
+float R1 = 98000.00; // resistance of R1 (100K) 
+float R2 = 9880.00; // resistance of R2 (10K) 
+int val = 0;
+void setup(){
+   pinMode(analogInput, INPUT); //assigning the input port
+   Serial.begin(9600); //BaudRate
+}
+void loop(){
+   
+   val = analogRead(analogInput);//reads the analog input
+   Vout = (val * 5.11) / 1024.00; // formula for calculating voltage out i.e. V+, here 5.00
+   Vin = Vout / (R2/(R1+R2)); // formula for calculating voltage in i.e. GND
+   I = Vin/(R2/(R1+R2));
+   //if (Vin<0.09)//condition 
+   {
+     //Vin=0.00;//statement to quash undesired reading !
+  } 
+Serial.print("\t V = ");
+Serial.print(Vin);
+Serial.print("\t I = ");
+Serial.print(I);
+delay(2000); //for maintaining the speed of the output in serial moniter
+}
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