What's Exponentiation ? Please teach me with understandable Example.

Answer 1

Exponentiation x**y is multiplying x number by itself y times.
x**1 = x
x**2 = x * x
x**3 = x * x * x
etc.

x**y expression is also read 'x to the power of y'. That's why in some languages there is a pow() or power() method.

Answer 2

2**1 = 2
2**2 = 2*2 = 4
2**3 = 2*2*2 = 8
2**4 = 2*2*2*2 = 16

Answer 3

Oh my. Well, I was going to explain but I think it'll be best if you take a look at this site.

http://www.mathsisfun.com/exponent.html