diff --git a/02_Day_Data_types/02_day_starter/main.js b/02_Day_Data_types/02_day_starter/main.js
index 7762908..e24d28a 100644
--- a/02_Day_Data_types/02_day_starter/main.js
+++ b/02_Day_Data_types/02_day_starter/main.js
@@ -1 +1,55 @@
-// this is your main.js script
\ No newline at end of file
+// this is your main.js script
+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(3,7))
+console.log(challenge.substring(3))
+console.log(challenge.includes("Script"))
+console.log(challenge.split())
+console.log(challenge.split(' '))
+let companies = 'Facebook, Google, Microsoft, Apple, IBM, Oracle, Amazon'
+console.log(companies.split(', '))
+console.log(challenge.replace("JavaScript", 'Python'))
+console.log(challenge.charAt(15))
+console.log(challenge.charCodeAt('J'))
+console.log(challenge.indexOf('a'))
+console.log(challenge.lastIndexOf('a'))
+console.log('You cannot end a sentence with because because because is a conjunction'.indexOf("because"))
+console.log('You cannot end a sentence with because because because is a conjunction'.lastIndexOf("because"))
+console.log('You cannot end a sentence with because because because is a conjunction'.search("because"))
+console.log(' 30 Days Of JavaScript '.trim(' '))
+console.log(challenge.startsWith('30'))
+console.log(challenge.endsWith('JavaScript'))
+console.log(challenge.match('a'))
+console.log('30 Days of'.concat(' JavaScript'))
+console.log(challenge.repeat(2))
+//exercise 2
+console.log("The quote 'There is no exercise better for the heart than reaching down and lifting people up.' by John Holmes teaches us to help one another.")
+console.log("Love is not patronizing and charity isn't about pity, it is about love. Charity and love are the same -- with charity you give love, so don't just give money but reach out your hand instead.")
+let num = "10"
+num = parseInt(num)
+console.log(typeof num)
+console.log(typeof parseFloat('9.8'))
+console.log("Python".includes('on'))
+console.log("jargon".includes('on'))
+console.log('I hope this course is not full of jargon'.includes('jargon'))
+console.log(Math.floor(Math.random()*100))
+console.log(Math.floor(Math.random(50) *100))
+console.log(Math.floor(Math.random()*255))
+let string = 'JavaScript'
+console.log(string[Math.floor(Math.random()* string.length)])
+console.log("1\t1\t1\t1\t1\n2\t1\t2\t4\t8\n3\t1\t3\t9\t27\n4\t1\t4\t16\t64\n5\t1\t5\t25\t125")
+let sentence = 'You cannot end a sentence with because because because is a conjunction'
+console.log(sentence.replace(sentence.substring(31,54),""))
+//exercise 3
+let phase = 'Love is the best thing in this world. Some found their love and some are still looking for their love.'
+console.log(phase.match(/love/gi))
+let phaseSentence = 'You cannot end a sentence with because because because is a conjunction'
+console.log(phaseSentence.match(/because/g))
+const sen = '%I $am@% a %tea@cher%, &and& I lo%#ve %te@a@ching%;. The@re $is no@th@ing; &as& mo@re rewarding as educa@ting &and& @emp%o@weri@ng peo@ple. ;I found tea@ching m%o@re interesting tha@n any ot#her %jo@bs. %Do@es thi%s mo@tiv#ate yo@u to be a tea@cher!? %Th#is 30#Days&OfJavaScript &is al@so $the $resu@lt of &love& of tea&ching'
+let regEx = /[%+@+$+&+#+;+!]/g
+console.log(sen.replace(regEx,''))
+let moneySen ='He earns 5000 euro from salary per month, 10000 euro annual bonus, 15000 euro online courses per month.'
+console.log(moneySen.match(/\d+/g))
\ No newline at end of file