Arduino Forbids Comparison Between Pointer and Integer Error

Arduino: ISO C++ forbids comparison between pointer and integer

Following a simple hello world example for the Arduino Yún got me for a second. The error output was the following:

Build options changed, rebuilding all
data_logger.ino: In function 'String getTimeStamp()':
data_logger.ino:46:13: error: ISO C++ forbids comparison between pointer and integer [-fpermissive]
Error compiling.

The code for getTimeStamp is as simple as this:

String getTimeStamp(){
  String result;
  Process time;

  while(time.available() > 0){
    char c =;
    if(c != "\n") result += c; //Offending line of code

  return result;

This time around, Google did not help much. One thing it brought up is how mean geeks can be with newbies on forums and why I never liked to hang out in those. PaulS seems kinda cranky. But I digress, that is a subject for another post.

At the end, it took me a second to realize that the issue was the double quotes in the if(c != "\n") comparison. So, instead it should have been singled quoted, like if(c != '\n').