diff --git a/bmi.js b/bmi.js
new file mode 100644
index 0000000..de57c0e
--- /dev/null
+++ b/bmi.js
@@ -0,0 +1,30 @@
+/*姓名:林沛萱*/
+
+function getBMI(height, weight){
+  var bmi = weight/(Math.pow((height/100),2));
+  return "你的bmi為 : "+bmi;
+}
+
+console.log(getBMI(174,65));
+
+function getMessage(height, weight){
+ 
+  var bmi = weight/(Math.pow((height/100),2));
+  if (bmi < 18.5){
+      return  "建議 : "+"體重過輕";
+  }
+  else if(18.5<=bmi && bmi<24){
+      return "建議 : "+"正常範圍";
+  }
+  else if(24<=bmi && bmi<27){
+      return "建議 : "+"過重";
+  }
+  else if(27<=bmi && bmi<30){
+      return "建議 : "+"輕度肥胖";
+  }
+  else if(30<=bmi && bmi<35){
+      return "建議 : "+"中度肥胖";
+  }
+  else return "建議 : "+"重度肥胖";
+}
+console.log(getMessage(174,65));
\ No newline at end of file