Sonar sensor to arduino to servo

Projects Programming
16 
#include <Servo.h>
 const int trigger=3;
 const int echo=2;
 const int nAngles = 5;

 Servo xServo;
 const int angles [nAngles] = {0, 45, 90, 135, 180};
 float ranges [nAngles];

 void setup()
 {
 Serial.begin(9600);
 pinMode(trigger,OUTPUT);
 pinMode(echo,INPUT);
 xServo.attach(10);
 }

 void loop()
 {
 for (int i = 0; i < nAngles; ++i) {
 xServo.write (angles [i]);
 delay (500);
 ranges [i] = getRange (); 
 delay(50);
 }
 
 for (int i = 0; i < nAngles; ++i) {
 Serial.println(ranges [i]);
 }

 //initial value
 int closestRange = ranges[0];
 int closestRangeIndex = 0;

 for (int i = 0; i < nAngles; i++) {
 if (closestRange > ranges[i]) {
 closestRange = ranges[i];
 closestRangeIndex = i;
 }
 }

 xServo.write (angles [closestRangeIndex ]);
 delay (500);
 }

 float getRange ()
 {
 digitalWrite(trigger,LOW);
 delayMicroseconds(5);
 digitalWrite(trigger,HIGH);
 delayMicroseconds(10);
 digitalWrite(trigger,LOW);

 return pulseIn(echo,HIGH) * 0.0001657;
 }

no error in compiling, but i don't know why. there's an error in uploading.

What are you getting printed from this?

~the ranges of the distance sensor..