diff --git a/2017-chu-kmgs4524.js b/2017-chu-kmgs4524.js
new file mode 100644
index 0000000..2eedce9
--- /dev/null
+++ b/2017-chu-kmgs4524.js
@@ -0,0 +1,30 @@
+//李侑乘
+function getBMI(weight, height){
+    var bmi = weight / (height * height);
+    console.log(bmi);
+    return bmi;
+}
+
+
+
+function getMessage(weight, height){
+    var result = getBMI(weight, height);
+    
+    if(result < 18.5){
+        console.log("BMI = " + result + ", 體重過輕");
+    } else if(18.5 <= result && result < 24){
+        console.log("BMI = " + result + ", 正常範圍");
+    } else{
+        if(24 <= result && result < 27){
+            console.log("BMI = " + result + ", 過重");
+        } else if(27 <= result && result < 30){
+
+        } else if(30 <= result && result < 35){
+            console.log("BMI = " + result + ", 中度肥胖");
+        } else{
+            console.log("BMI = " + result + ", 重度肥胖");
+        }
+    }
+}
+
+getMessage(100, 1.75);
\ No newline at end of file