Skip to content

% Divide

Syntax: x%y, %[x;y]

Where x and y are conformable numerics or (both) timespans, returns their ratio as a float.

Note that this is different from some other programming languages, e.g. C++.

q)2%3
0.6666667
q)halve:%[;2]                              /projection
q)halve til 5
0 0.5 1 1.5 2
q)(`a`b`c!100 200 300)%2                   /dictionary
a| 50
b| 100
c| 150
q)t:([]price:10 20 30;qty:200 150 17)
q)t%\:1 2                                  /halve the quantities
price qty
---------
10    100
20    75
30    8.5
q)00:00:10.000000000 % 00:00:05.000000000  /ratio of timespans
2f

Dates are represented internally as days after 2000.01.01, so the ratio of two dates is the ratio of their respective number of days since 2000.01.01.

q)"i"$2010.01.01 2005.01.01                /days since 2000.01.01
3653 1827i
q)(%/)"i"$2010.01.01 2005.01.01
1.999453
q)2010.01.01 % 2005.01.01
1.999453

Divide is an atomic function.

Range and domains

Both domains are b g x h i j e f c s p m d z n u v t.

The result is always a float.

div, ratios
Basics: Mathematics
Q for Mortals: §4.4 Basic Arithmetic

Errors

error cause
length the arguments are not conformable
type an atom of an argument is not numeric or temporal