-bash-4.3$ ./power1 1.2 50
1.2 to the power of 50 is 9100.44
power called 50 times
-bash-4.3$ ./power2 1.2 50
1.2 to the power of 50 is 9100.44
power called 6 times
-bash-4.3$ ./power2 -3 7
-3 to the power of 7 is -2187
power called 3 times
-bash-4.3$ ./power2
usage: ./power2 xValue nValue
-bash-4.3$ ./power2 3 -2
second number may not be negative