The format() Function

The format() function formats a value to the format specified in the formatspec parameter.

Syntax

n = String.format(formatspec, value)

Part

Description

The string returned from the function

formatspec

The syntax of the format specification:

% width.precision type

width - Optional. Specifies the minimum number of characters printed.

precision - Optional. Sets the precision of the output value. Can take one of the following values:

d	The minimum number of digits to print. Default is 1
f	The number of digits after the decimal point. Default is 6
s	The maximum number of characters to print. By default, all characters are printed

type - Required. Determines how to interpret the formatted value. Can take one of the following values:

d	Integer - the output value has nd digits
f	Floating-Point - the output value has nf decimal digits
s	String - Characters are printed to the end of the string or until the precision value is reached

value

Any value

Example

var b = String.format("%4.3d", 32);
var d = String.format("%3f", 10.1234);
var e = String.format("%2.2f", 2.3)

Result

b = " 032"
d = "10.123"
e = "2.30"

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