This is documentation for Mathematica 6, which was
based on an earlier version of the Wolfram Language.

# NumberForm

 NumberForm[expr, n]prints with approximate real numbers in expr given to n-digit precision.
• NumberForm[expr, {n, f}] prints with approximate real numbers having n digits, with f digits to the right of the decimal point.
• NumberForm works on integers as well as approximate real numbers.
• The following options can be given:
 DigitBlock Infinity number of digits between breaks ExponentFunction Automatic function to apply to exponents ExponentStep 1 steps by which exponents can increase NumberFormat Automatic function used to assemble mantissa, base, exponent NumberMultiplier "×" string to use to indicate multiplication NumberPadding {"","0"} strings to use for left and right padding NumberPoint "." decimal point string NumberSeparator {",", " "} string to insert at breaks between blocks NumberSigns {"-",""} strings to use for signs of negative and positive numbers SignPadding False whether to insert padding after the sign
• NumberForm acts as a "wrapper", which affects printing, but not evaluation.
Display the first 10 digits of a numeric approximation to :
 Out[1]//NumberForm=

Display a number with 3 precise digits and 4 digits to the right of the decimal:
 Out[1]//NumberForm=