4.94 sqrt - Square Root

Format : sqrt( $num$ )

Find out the square root of $num$ .

Example

Example 1: Basic Example

$ more dat1.csv
id,val
1,9
2,2
3,
4,-1
$ mcal c='sqrt(${val})' a=rsl i=dat1.csv o=rsl1.csv
#END# kgcal a=rsl c=sqrt(${val}) i=dat1.csv o=rsl1.csv
$ more rsl1.csv
id,val,rsl
1,9,3
2,2,1.414213562
3,,
4,-1,