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