@@ -21,3 +21,10 @@ const number1 = "50"
 const number2 = "100"
 const result = Number(number1) + Number(number2)
 console.log(result)
+
+let hobby = "I love football and traveling"
+let moreHobby = hobby.replaceAll("football", "swiming").replaceAll("traveling", "hiking")
+console.log(moreHobby)
+
+const passion = hobby.substring(0, 15)
+console.log(passion)