Format: power( ,power)
,power) 
Calculate the power of  . This function is equivalent to the ^ operator. The function returns NULL value if the result exceeds the largest real number.
. This function is equivalent to the ^ operator. The function returns NULL value if the result exceeds the largest real number. 
$ more dat1.csv
id,base,exponent
1,5,2
2,2,8
3,,
4,0,10
5,10,0
6,2,0.5
7,2,-1
$ mcal c='power(${base},${exponent})' a=rsl i=dat1.csv o=rsl1.csv
#END# kgcal a=rsl c=power(${base},${exponent}) i=dat1.csv o=rsl1.csv
$ more rsl1.csv
id,base,exponent,rsl
1,5,2,25
2,2,8,256
3,,,
4,0,10,0
5,10,0,1
6,2,0.5,1.414213562
7,2,-1,0.5