====== BASH - Strings - Check if a String contains a Substring ======

===== Using double brackets with wildcard =====

<code bash>
string='My long string'
if [[ $string == *"My long"* ]]; then
  echo "It's there!"
fi
</code>

<WRAP info>
**NOTE:**  Spaces in the Substring need to be placed between double quotes.

The **<nowiki>*</nowiki>** asterisks should be outside the double quotes.

A simple comparison operator is used (i.e. **==**), not the regex operator **=~**.

The comparison can be reversed by just switching to **!=** in the test.
</WRAP>

----

===== Regex approach =====

<code bash>
string='My string';

if [[ $string =~ "My" ]]; then
   echo "It's there!"
fi
</code>

----

===== Using a case statement =====

<code bash>
case "$string" in 
  *foo*)
    # Do stuff
    ;;
esac
</code>