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JavaScript JavaScript Basics (Retired) Working With Numbers The Random Challenge Solution

moustafa ahmed
moustafa ahmed
1,215 Points
Posted by moustafa ahmed
moustafa ahmed
1,215 Points

i forgot to add parseINT but i couldnt notice any wrong running my app

var userIput = prompt( "kindly add a number"); var randomNumber = Math.floor(Math.random() * userIput) +1; alert(randomNumber);

1 Answer

Tsenko Aleksiev
Tsenko Aleksiev
3,819 Points
Tsenko Aleksiev
Tsenko Aleksiev
3,819 Points

Try adding 5x ( or any oder char after the number ) to the prompt box - you will get a NaN as a result. The type of the object from the prompt is allways a string but the Math methods floor and random do the conversion of the types. Try using Object.prototype.toString.call(the var name); If you try this on userIput before using the math methods you will see that the result be a string. Try the same thing but instead only the var name write this Math.floor(userIput) and you will get the result - number. For the sace of your program it works but don't do it in a real program ;)