The following symbols are used in formatting numbers. They will be substituted for the placeholders in Number Patterns.
Name 
English Example 

Meaning 
decimal 
2,345.67 

decimal separator 
group 
2,345.67 

grouping separator, typically for thousands 
minusSign 
+23 
* 
the plus sign used with numbers 
plusSign 
23 
* 
the minus sign used with numbers
The + and  symbols are intended for unary usage, and not for binary usage; thus represents either the positive number or a negative number. For example, in an operation 3 (2), the defined symbol would be used for the second minus sign, but not for the subtraction operator. Any directionality markers needed (e.g. <LRM>) to keep with the number should be included. 
percentSign 
23.4% 
* 
the percent sign (out of 100) 
perMille 
234‰ 
* 
the permille sign (out of 1000) 
exponential 
1.2E3 
* 
used in computers for 1.2×10³. 
superscriptingExponent  1.2×10^{3 }  *  humanreadable format of exponential 
infinity 
∞ 
* 
used in +∞ and ∞. 
nan 
NaN 
* 
"not a number".

* – Doesn't typically need to be changed in translation.
Important: Review the examples on the rightside pane to ensure that all pattern and symbols are as expected.
The winning symbols are used in the Number Format examples. Please complete the Symbols before working on Number formats. 