sqrt

Square root

sqrt x    sqrt[x]

Returns as a float where x is numeric and

• non-negative, the square root of x
• negative or null, null
• real or float infinity, 0w
• any other infinity, the square root of the largest value for the datatype

q)sqrt -1 0n 0 25 50
0n 0n 0 5 7.071068

q)sqrt 12:00:00.000000000
6572671f

q)sqrt 0Wh
181.0166

q)sqrt 101b
1 0 1f

Implicit iteration

sqrt is an atomic function.

q)sqrt (10;20 30)
3.162278
4.472136 5.477226

q)k:`k xkey update k:`abc`def`ghi from t:flip d:`a`b!(10 21 3;4 5 6)

q)sqrt d
a| 3.162278 4.582576 1.732051
b| 2        2.236068 2.44949

q)sqrt t
a        b
-----------------
3.162278 2
4.582576 2.236068
1.732051 2.44949

q)sqrt k
k  | a        b
---| -----------------
abc| 3.162278 2
def| 4.582576 2.236068
ghi| 1.732051 2.44949

Domain and range

domain b g x h i j e f c s p m d z n u v t
range  f . f f f f f f f . f f f z f f f f

Range: fz

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exp, log, xexp, xlog
Mathematics