diff --git a/Jenkinsfile b/Jenkinsfile
index b7fb5cd9d095974407f5f1f75770a2efb4caa207..e31dadfca482d13911a9ff5dc755479a15f60a2f 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -4,6 +4,12 @@ pipeline {
     /* Jenkins为流水线分配一个执行器和工作区*/
     agent any
 
+    def singlyQuoted='hello'
+    def doublyQuoted="world"
+
+    echo 'hello mr. ${singlyQuoted}'
+    echo "i said hello mr. ${doublyQuoted}"
+
     stages {
 
         stage('Git Checkout') {