diff --git a/Learning_to_use_sensor.ino b/Learning_to_use_sensor.ino
new file mode 100644
index 0000000..4cf7100
--- /dev/null
+++ b/Learning_to_use_sensor.ino
@@ -0,0 +1,33 @@
+#define trigPin 9
+#define echoPin 10
+
+void setup() {
+  Serial.begin (9600);
+  pinMode(trigPin, OUTPUT);
+  pinMode(echoPin, INPUT);
+}
+
+void loop() {
+  float duration, distance;
+  digitalWrite(trigPin, LOW); 
+  delayMicroseconds(2);
+ 
+  digitalWrite(trigPin, HIGH);
+  delayMicroseconds(10);
+  digitalWrite(trigPin, LOW);
+  
+  duration = pulseIn(echoPin, HIGH);
+  distance = (duration / 2) * 0.0344;
+  
+  if (distance >= 400 || distance <= 2){
+    Serial.print("Distance = ");
+    Serial.println("Out of range");
+  }
+  else {
+    Serial.print("Distance = ");
+    Serial.print(distance);
+    Serial.println(" cm");
+    delay(500);
+  }
+  delay(500);
+}