Jenkins pipeline parameters select

Jenkins pipeline parameters can be defined using the `parameters` block in the pipeline script. To create a parameter of type select, you can use the following syntax:

parameters {
    select(
        name: 'PARAM_NAME',
        choices: ['CHOICE_1', 'CHOICE_2', 'CHOICE_3'],
        description: 'Select an option'
    )
}

In this example, replace `PARAM_NAME` with the name of your parameter, `CHOICE_1`, `CHOICE_2`, and `CHOICE_3` with the options you want to offer, and `Select an option` with a description of the parameter to be displayed to the user.

You can use the selected value in your pipeline script using the `params.PARAM_NAME` syntax. For example:

stage('Example') {
    steps {
        echo "Selected option: ${params.PARAM_NAME}"
    }
}

This will display the selected option in the build logs.