Checking if output of a command contains a certain string in a shell script

Question

I\'m writing a shell script, and I\'m trying to check if the output of a command contains a certain string. I\'m thinking I probably have to use grep, but I\'m not sure how.

Answer 1

Testing $? is an anti-pattern

if ./somecommand | grep -q 'string'; then
  echo "matched"
fi