请帮我写一个jenkins中的pipeline，如果选项参数A选中project01，则输出A的值，如果选项参数A选中project02,则创建一个变量B=123，并输出B的值

pipeline { agent any parameters { choice(name: 'A', choices: ['project01', 'project02'], description: 'Select a project') } stages { stage('Check project') { steps { script { if (params.A == 'project01') { echo "A value is ${params.A}" } else if (params.A == 'project02') { def B = 123 echo "B value is ${B}" } else { error("Invalid project selected") } } } } } }