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#radixRrational reads rational in radix radix. radix must consist of only digits that are interpreted as an integer in decimal radix; its value must be between 2 and 36 (inclusive). Only valid digits for the specified radix may be used.

For example, #3r102 is another way of writing 11 (decimal), and #11R32 is another way of writing 35 (decimal). For radices larger than 10, letters of the alphabet are used in order for the digits after 9. No alternate # notation exists for the decimal radix since a decimal point suffices.

The next figure contains examples of the use of #B, #O, #X, and #R.

#2r11010101  ;Another way of writing 213 decimal  
#b11010101   ;Ditto                               
#b+11010101  ;Ditto                               
#o325        ;Ditto, in octal radix               
#xD5         ;Ditto, in hexadecimal radix         
#16r+D5      ;Ditto                               
#o-300       ;Decimal -192, written in base 8     
#3r-21010    ;Same thing in base 3                
#25R-7H      ;Same thing in base 25               
#xACCEDED    ;181202413, in hexadecimal radix     

Figure 2-20. Radix Indicator Example

The consequences are undefined if the token immediately following the #nR does not have the syntax of a rational in radix n.

The following X3J13 cleanup issue, not part of the specification, applies to this section:

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