string/format

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Line 18: Line 18:
 
|type=string
 
|type=string
 
|desc=The formatted string
 
|desc=The formatted string
 +
}}
 +
{{Example
 +
|Description=Example showing the different types of format codes.
 +
|Code=s = "Hello, world!"
 +
 +
// string
 +
print(string.format("here's a string: %s", s))
 +
 +
// string with quotes
 +
print(string.format("here's a quoted string: %q", s))
 +
 +
// characters from numeric values
 +
print(string.format("%c%c%c", 65, 66, 67))
 +
 +
// number with an exponent
 +
print(string.format("%e, %E", math.pi, math.pi))
 +
 +
// float and compact float
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print(string.format("%f, %G", math.pi, math.pi))
 +
 +
// signed, signed, and unsigned int
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print(string.format("%d, %i, %u", -100, -100, -100))
 +
 +
// octal, hex, and uppercase hex
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print(string.format("%o, %x, %X", -100, -100, -100))
 +
|Output=here's a string: Hello, world!
 +
here's a quoted string: "Hello, world!"
 +
ABC
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3.141593e+000, 3.141593E+000
 +
3.141593, 3.14159
 +
-100, -100, 4294967196
 +
37777777634, ffffff9c, FFFFFF9C
 
}}
 
}}

Revision as of 13:11, 12 February 2019

 string.format( )

Contents

Description

Formats the specified values into the string given.

Arguments

string format

The string to be formatted.

Follows this format: http://www.cplusplus.com/reference/cstdio/printf/

Arguments

vararg formatParameters

Values to be formatted into the string.

Returns

string

The formatted string

Examples

Example

Example showing the different types of format codes.

s = "Hello, world!"
 
// string
print(string.format("here's a string: %s", s))
 
// string with quotes
print(string.format("here's a quoted string: %q", s))
 
// characters from numeric values
print(string.format("%c%c%c", 65, 66, 67))
 
// number with an exponent
print(string.format("%e, %E", math.pi, math.pi))
 
// float and compact float
print(string.format("%f, %G", math.pi, math.pi))
 
// signed, signed, and unsigned int
print(string.format("%d, %i, %u", -100, -100, -100))
 
// octal, hex, and uppercase hex
print(string.format("%o, %x, %X", -100, -100, -100))

Output:

here's a string: Hello, world!

here's a quoted string: "Hello, world!" ABC 3.141593e+000, 3.141593E+000 3.141593, 3.14159 -100, -100, 4294967196

37777777634, ffffff9c, FFFFFF9C
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