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Perl Pocket Reference, 5th Edition
book

Perl Pocket Reference, 5th Edition

by Johan Vromans
July 2011
Intermediate to advanced content levelIntermediate to advanced
104 pages
2h 14m
English
O'Reilly Media, Inc.
Content preview from Perl Pocket Reference, 5th Edition

Formatted Printing

printf and sprintf format a list of values according to a format string that may use the following conversions:

%%

A percent sign.

%b

An unsigned integer (binary).

%c

The character corresponding to the ordinal value.

%d

A signed integer.

%e

A floating-point number (scientific notation).

%f

A floating-point number (fixed decimal notation).

%g

A floating-point number (%e or %f notation).

%i

A synonym for %d.

%n

The number of characters formatted so far is stored into the corresponding variable in the parameter list.

%o

An unsigned integer (octal).

%p

A pointer (address in hexadecimal).

%s

A string.

%u

An unsigned integer (decimal).

%x

An unsigned integer (hexadecimal).

%B

Like %b, but using an uppercase B.

%D

An obsolete synonym for %ld.

%E

Like %e, but using an uppercase E.

%F

An obsolete synonym for %f.

%G

Like %g, but with an uppercase E (if applicable).

%O

An obsolete synonym for %lo.

%U

An obsolete synonym for %lu.

%X

Like %x, but using uppercase letters.

The following flags can be put between the % and the conversion letter:

space

Prefix a positive number with a space.

+

Prefix a positive number with a plus sign.

-

Left-align within the field.

0

Use zeros instead of spaces to right-align.

#

With o, b, x, and X: prefix a nonzero number with 0, 0b, 0x, or 0X.

number

Minimum field width.

.number

For a floating-point number, the number of digits after the decimal point. For a string, the maximum length. For an integer, the minimum width. The integer will be right-aligned, padded with zeros.

h

Interpret integer as C type ...

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Publisher Resources

ISBN: 9781449311186Errata Page