Fix typos

02_Day/02_day_data_types.md

@@ -617,7 +617,7 @@ console.log(string.charCodeAt(lastIndex)) // t ASCII is 116
 
 ```
 
-13. *indexOf()*: Takes takes a substring and if the substring exists in a string it returns the first position of the substring if does not exist it returns -1
+13. *indexOf()*: Takes a substring and if the substring exists in a string it returns the first position of the substring if does not exist it returns -1
 
 ```js
 string.indexOf(substring)
@@ -635,10 +635,10 @@ console.log(string.indexOf('Script'))     //15
 console.log(string.indexOf('script'))     // -1
 ```
 
-14. *lastIndexOf()*: Takes takes a substring and if the substring exists in a string it returns the last position of the substring if it does not exist it returns -1
+14. *lastIndexOf()*: Takes a substring and if the substring exists in a string it returns the last position of the substring if it does not exist it returns -1
 
 ```js
-string.lastIndexOf(index)
+string.lastIndexOf(substring)
 ```
 
 ```js
@@ -801,7 +801,7 @@ console.log(typeof null)        // object
 
 ### Changing data type(Casting)
 
-- Casting: Converting one data type to another data type. We use _parseInt()_, _parsefloat()_,_Number()_, _+ sign_, _str()_
+- Casting: Converting one data type to another data type. We use _parseInt()_, _parseFloat()_, _Number()_, _+ sign_
   When we do arithmetic operations string numbers should be first converted to integer or float if not it returns an error.
 
 #### String to Int
@@ -941,13 +941,13 @@ console.log(numInt) // 9
     5 1 5 25 125
     ```
 
-9.  Use __substr__ to slice out the phase __because because because__ in the following sentence:__'You cannot end a sentence with because because because is a conjunction'__
+9.  Use __substr__ to slice out the phrase __because because because__ in the following sentence:__'You cannot end a sentence with because because because is a conjunction'__
 
 ### Exercises: Level 3
 
 1. 'Love is the best thing in this world. Some found their love and some are still looking for their love.' Count the number of word love in this sentence.
 2. Use __match()__ to count the number all because's in the following sentence:__'You cannot end a sentence with because because because is a conjunction'__
-3. Clean the following text and find the most frequent word(hint, use replace and regular express).
+3. Clean the following text and find the most frequent word (hint, use replace and regular express).
 
     ```js
         const sentence = '%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'