Some buttons like cube, log, ln, square, square root, backspace are added to improve user experience. #14
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Following changes were made in the original source code.
Buttons added.
Cube:
After entering a number click this button to calculate cube of the number.
LOG:
After entering a number click this button to calculate log to the base 10 of the number.
LN:
After entering a number click this button to calculate log to the base e of the number.
Square:
After entering a number click this button to calculate square of the number.
Square root:
After entering a number click this button to calculate square root of the number.
Backspace:
Click this button to delete digits of the number one by one.