Hello 
This is the fourth day of #30 days of javascrip coding, at this day i learned that
1- I used console.log(type of " ") function To identify the type of data that was printed 
2- I learned that there are many types of data We will learn about it in the following lines
3- The first type of data called string and It must be written in  double quotes mark 
4- The second type of data called number and It should not be written in double quotes mark So as not to be treated like string
5-The third type of data called object in a form of array                       6- The fourth type of data called object a nd his type is object object  and his type is object                                                                               7- There are other types of data such as boolean value an undefined and null                                                                                                   This is the codes that i used


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