How to assert that a string has a newline character and, if so, remove it

I have a string that is the result of some operation I have no control over. When I print this variable using echo, I get: echo $myvar hello However, when I do if [ $myvar = "hello" ]; then echo they are equal else echo they are not equal fi I always get that they are not equal. I suspect this is because of a newline character. The string also behaves strangely. When I do: newVAR="this is my var twice: "$myvar$myvar echo $newVAR I get: hellois my var twice: hello How can I check if this is in fact due to a newline and, if so, remove it?