div
¶
Integer division
x div y div[x;y]
Returns the greatest whole number that does not exceed x%y
.
q)7 div 3
2
q)7 div 2 3 4
3 2 1
q)-7 7 div/:\:-2.5 -2 2 2.5
2 3 -4 -3
-3 -4 3 2
Except for char, byte, short, and real, preserves the type of the first argument.
q)7f div 2
3f
q)6i div 4
1i
q)2014.10.13 div 365
2000.01.15
The exceptions are char, byte, short, and real, which get converted to ints.
q)7h div 3
2i
q)0x80 div 16
8i
q)"\023" div 8
2i
div
is a multithreaded primitive.
Implicit iteration¶
div
is an atomic function.
q)(10;20 30)div(3 4; -5)
3 2
-4 -6
It applies to dictionaries and keyed tables.
q)k:`k xkey update k:`abc`def`ghi from t:flip d:`a`b!(10 -21 3;4 5 -6)
q)d div 5
a| 2 -5 0
b| 0 1 -2
q)k div 5
k | a b
---| -----
abc| 2 0
def| -5 1
ghi| 0 -2
Domain and range¶
b g x h i j e f c s p m d z n u v t
----------------------------------------
b | i . i i i i i i i . i i i i i i i i
g | . . . . . . . . . . . . . . . . . .
x | i . i i i i i i i . i i i i i i i i
h | i . i i i i i i i . i i i i i i i i
i | i . i i i i i i i . i i i i i i i i
j | j . j j j j j j j . j j j j j j j j
e | f . f f f f f f f . f f f f f f f f
f | f . f f f f f f f . f f f f f f f f
c | i . i i i i i i i . i i i i i i i i
s | . . . . . . . . . . . . . . . . . .
p | p . p p p p p p p . p p p p p p p p
m | m . m m m m m m m . m m m m m m m m
d | d . d d d d d d d . d d d d d d d d
z | z . z z z z z z z . z z z z z z z z
n | n . n n n n n n n . n n n n n n n n
u | u . u u u u u u u . u u u u u u u u
v | v . v v v v v v v . v v v v v v v v
t | t . t t t t t t t . t t t t t t t t
Range: dfijmnptuvz
%
Divide, div
, reciprocal
Mathematics
Q for Mortals: ยง4.8.1 Integer Division div
and Modulus mod