# Loop over lines

`while read` hands each line to `decide` on its own. The loop acts on each answer.

*The two complaints open a case. The thanks and the question about blue do not.*

```
question="Is this a complaint?"

is_complaint() {
  printf '%s' "$1" |
  thinkthen decide "$question" --quiet
}

cat <<'EOF' |
Arrived a day early. Thank you!
The zipper broke the first time I used it.
Does this come in blue?
The strap snapped on day two.
EOF
while read -r review; do
  if is_complaint "$review"; then
    echo "Open a case: $review"
  fi
done
```

*Output*

```
Open a case: The zipper broke the first time I used it.
Open a case: The strap snapped on day two.
```

*exit 0*

On GitHub: [github.com/botassembly/thinkthen](https://github.com/botassembly/thinkthen)