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Default Format | ": _ 1 _ | Format

Default output is identical to this monadic case, providing a minimum of one space between columns. For example:

       ]text=: ": i. 2 5
    0 1 2 3 4
    5 6 7 8 9

       $ text
    2 9

       3 + text
    |domain error
    |   3  +text

       '*#' ,. text
    *0 1 2 3 4
    #5 6 7 8 9

       ": 'abcd'
    abcd

       $ ": ''
    0

`x":y` produces a literal representation of`y` in a format specified by`x` .`` Each element of`x` is a complex number`w j. d` ,`` controlling the representation of the corresponding column of`y` as follows:
`|w` specifies the width allocated; if this space is inadequate, the entire space is filled with asterisks. If`w` is zero, enough space is allocated.
`|d` specifies the number of digits following the decimal point (itself included only if`d` is not zero).
Any negative sign is placed just before the leading digit. If`w>:0` and`d>:0`,`` the result is right-justified in the space. Otherwise (if`w<0` or`d<0`),`` the result is put in exponential form (with one digit before the decimal point) and is left-justified except for two fixed spaces on the left (including one for a possible negative sign).
The format`w+d%10` (or its negation) is obsolescent; e.g.`_7.2` instead of`_7j2`.
Only the real part of complex`y` is formatted. See below for boxed`y` .

       n ; 6j2 ": n=: % i. 2 4
    +--------------------------+------------------------+
    |   _   1      0.5 0.333333|     _  1.00  0.50  0.33|
    |0.25 0.2 0.166667 0.142857|  0.25  0.20  0.17  0.14|
    +--------------------------+------------------------+

       (7j2 ": -n) ; (3j2 ": n)
    +----------------------------+------------+
    |     __  _1.00  _0.50  _0.33|  _*********|
    |  _0.25  _0.20  _0.17  _0.14|************|
    +----------------------------+------------+

       6j3 0j_6 ": 1r2 ^ 1 1000 *"1 i.5 2
     1.000  9.332636e_302
     0.250  8.128549e_904
     0.063  7.079811e_1506
     0.016  6.166381e_2108
     0.004  5.370801e_2710

The fit conjunction`` (`!.`)`` and`9!:10` specify the number of digits for floating-point numbers. For example:

       (": ; ":!.6 ; ":!.4 ; ":!.15) %7
    +--------+--------+------+-----------------+
    |0.142857|0.142857|0.1429|0.142857142857143|
    +--------+--------+------+-----------------+

For a boxed right argument, a two-element left argument specifies position in the display, using`0`,`1`,`` and `2` for top/center/bottom, and left/center/right.`` `9!:16` and`9!:17` specify the default positions.`` `9!:6` and`9!:7` specify the box drawing characters used.

       x=: 2 3 $ (2 #&.> 1+i.6) $&.> 'abcdef'
       (": x) ,. ' ' ,. (2 1 ": x)
    +----+-----+------+ +----+-----+------+
    |a   |bb   |ccc   | |    |     | ccc  |
    |    |bb   |ccc   | |    | bb  | ccc  |
    |    |     |ccc   | | a  | bb  | ccc  |
    +----+-----+------+ +----+-----+------+
    |dddd|eeeee|ffffff| |    |     |ffffff|
    |dddd|eeeee|ffffff| |    |eeeee|ffffff|
    |dddd|eeeee|ffffff| |dddd|eeeee|ffffff|
    |dddd|eeeee|ffffff| |dddd|eeeee|ffffff|
    |    |eeeee|ffffff| |dddd|eeeee|ffffff|
    |    |     |ffffff| |dddd|eeeee|ffffff|
    +----+-----+------+ +----+-----+------+

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