diff --git a/02_Day_Data_types/02_day_starter/main.js b/02_Day_Data_types/02_day_starter/main.js
index 7762908..605d53c 100644
--- a/02_Day_Data_types/02_day_starter/main.js
+++ b/02_Day_Data_types/02_day_starter/main.js
@@ -1 +1,54 @@
-// this is your main.js script
\ No newline at end of file
+// this is your main.js script
+
+// ### Exercise: Level 1
+
+let challenge = "30 Days Of JavaScript";
+
+console.log(challenge);
+console.log(challenge.length);
+
+console.log(challenge.toUpperCase());
+console.log(challenge.toLowerCase());
+
+console.log(challenge.substring(0, 2));
+console.log(challenge.substr(3, 4));
+console.log(challenge.substr(3, 18));
+
+console.log(challenge.includes("Script"));
+
+console.log(challenge.split());
+console.log(challenge.split(" "));
+
+let testString = "Facebook, Google, Microsoft, Apple, IBM, Oracle, Amazon";
+console.log(testString.split(", "));
+
+console.log(challenge.replace("JavaScript", "Python"));
+
+console.log(challenge.charAt(15));
+console.log(challenge.charCodeAt(11));
+
+console.log(challenge.indexOf("a"));
+console.log(challenge.lastIndexOf("a"));
+
+let because =
+  "You cannot end a sentence with because because because is a conjunction";
+console.log(because.indexOf("because"));
+console.log(because.lastIndexOf("because"));
+console.log(because.search("because"));
+
+let removeWhitespace = "\t30 Days Of JavaScript\t";
+console.log(removeWhitespace);
+console.log(removeWhitespace.trim());
+
+console.log(challenge.startsWith("30"));
+console.log(challenge.endsWith("Script"));
+
+const regex = /a/g;
+const search = challenge.match(regex);
+console.log(search);
+
+const firstPart = "30 Days of";
+const secondPart = "JavaScript";
+console.log(firstPart.concat(secondPart));
+
+console.log(challenge.repeat(2));
diff --git a/02_Day_Data_types/string_methods/match.js b/02_Day_Data_types/string_methods/match.js
index 40d1ffd..bbf3d94 100644
--- a/02_Day_Data_types/string_methods/match.js
+++ b/02_Day_Data_types/string_methods/match.js
@@ -1,22 +1,24 @@
 // match: it takes a substring or regular expression pattern as an argument and it returns an array if there is match if not it returns null. Let us see how a regular expression pattern looks like. It starts with / sign and ends with / sign.
-let string = 'love'
-let patternOne = /love/ // with out any flag
-let patternTwo = /love/gi // g-means to search in the whole text, i - case insensitive
-string.match(substring)
-let string = 'I love JavaScript. If you do not love JavaScript what else can you love.'
-console.log(string.match('love')) //
+let string = "love";
+let patternOne = /love/; // with out any flag
+let patternTwo = /love/gi; // g-means to search in the whole text, i - case insensitive
+string.match(substring);
+let stringM =
+  "I love JavaScript. If you do not love JavaScript what else can you love.";
+console.log(stringM.match("love")); //
 /*
 output
 
 ["love", index: 2, input: "I love JavaScript. If you do not love JavaScript what else can you love.", groups: undefined]
 */
-let pattern = /love/gi
-console.log(string.match(pattern)) // ["love", "love", "love"]
+let pattern = /love/gi;
+console.log(string.match(pattern)); // ["love", "love", "love"]
 // Let us extract numbers from text using regular expression. This is not regular expression section, no panic.
 
-let txt = 'In 2019, I run 30 Days of Python. Now, in 2020 I super exited to start this challenge'
-let regEx = /\d/g // d with escape character means d not a normal d instead acts a digit
-// + means one or more digit numbers, 
+let txt =
+  "In 2019, I run 30 Days of Python. Now, in 2020 I super exited to start this challenge";
+let regEx = /\d/g; // d with escape character means d not a normal d instead acts a digit
+// + means one or more digit numbers,
 // if there is g after that it means global, search everywhere.
-console.log(txt.match(regEx)) // ["2", "0", "1", "9", "3", "0", "2", "0", "2", "0"]
-console.log(txt.match(/\d+/g)) // ["2019", "30", "2020"]
+console.log(txt.match(regEx)); // ["2", "0", "1", "9", "3", "0", "2", "0", "2", "0"]
+console.log(txt.match(/\d+/g)); // ["2019", "30", "2020"]