Serial adds 10 to each number

When I write 35 he should say 51 and 53, but he also says 10, im using arduino nano v3. Here's my code void setup() { Serial.begin(9600); }

void loop() { int Data_in; if(Serial.available() > 0){ Data_in = Serial.read(); Serial.println(Data_in); } } Here's result 51 53 10

What is the ASCII code 10?

(This isn’t an installation issue - check your serial monitor line ending setting.)

Thanks, it works!!