isNumber(num)
Checks whether a var is a number, returns `true if this is the case.
Type: function
Parameter(s):
- num {Object | String | Number | Boolean}:The number to check 
Returns:
- 
    {Boolean}:
 returns true if this is the case 
Checks whether a var is a number, returns `true if this is the case.
Type: function
Parameter(s):
The number to check
Returns:
returns true if this is the case