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# Test Regular Expression Against A String

In BASH we can perform regular expression on a string using `=~` operator, example is given below -

## Usage

```bash
[[ "string" =~ pattern ]]
```

## Example

```bash
if [[ "Hello" =~ "1" ]]; then echo "True"; else echo "False"; fi
False
```

***Source:*** [***Unix - StackExchange***](https://unix.stackexchange.com/a/340485)