Medium: Jenkinsfile to accept build parameters (Sample shows sending email parameters)

Jenkinsfile

node('linux') {
  properties([[$class: 'RebuildSettings', autoRebuild: false, rebuildDisabled: false],
  parameters(
    [
      string(defaultValue: "", description: 'To', name: 'to'),
      string(defaultValue: "", description: 'Cc', name: 'cc'),
      string(defaultValue: "", description: 'Subject', name: 'subject'),
      string(defaultValue: "", description: 'Body', name: 'body'),
      string(defaultValue: "", description: 'From', name: 'from'),
    ]
  )])

  stage('Sending Email') {
    if (to == "" || subject == "" || body == "") {
      currentBuild.result = 'FAILURE'
      sh "exit 1" // this fails the stage
    }

    mail(
      to: "${to}",
      cc: "${cc}",
      subject: "${subject}",
      body: "${body}",
      from: "${from}",
    )
  }
}