Exponential notation of a decimal number
Given a positive decimal number, find the simple exponential notation (x = a·10^b) of the given number.
Input : 100.0 Output : 1E2 Explanation: The exponential notation of 100.0 is 1E2. Input :19 Output :1.9E1 Explanation: The exponential notation of 16 is 1.6E1.
The simplest way is to find the position of the first non zero digit and the position of the dot. The difference between that positions is the value of b (if the value is positive you should also decrease it by one).
Below is the implementation of the above approach:
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