I am quite a beginer and am trying to use ultrasound sensor with pure data.
Can numbers from Serial.print() and Serial.println () read from an ultrasound sensor HC SR04 read in a serial monitor be read in puredata.
I am using pduino o.5 abstraction to work in puredata
please suggest

The sensor you're using utilizes a built-in function of the Ardiuno language, pulseIn(), to measure distance. In order to use it with [pduino] you'll need to translate the internal code of this function to a Pd patch. It's a very usual mistake people make with pduino and this sensor.
You can try using my abstraction [serial_print] which works nicely with Arduino's Serial.print() function. You can get it here https://github.com/alexdrymonitis/Arduino_Pd

Note that in order to work you'll need to do something like this in the Arduino sketch:

Serial.print("distance "); // this is a tag for the distance data
// note the space at the end of the string, it is important so that the [serial_print] abstraction
// knows that the tag data has finished
Serial.println(distance); // here distance is a variable holding the output of the pulseIn() function returned in cm

Then in Pd do this:

[comport 0 9600]
|
[serial_print]
|           /
|         /
[send]

[receive distance]
|
[0\ <- this is a number atom

This should work. Check the Arduino sketches that come with the abstraction.