Texas Instruments TI-84 - Manual (Page 72)

Chapter 2: Math, Angle, and Test Operations 69
Note: abs( is also available on the MATH CPX menu.
round( round( round( round(
round( returns a number, expression, list, or matrix rounded to #decimals ( 9). If
#decimals
is omitted, value is rounded to the digits that are displayed, up to 10 digits.
round(value[,#decimals])
iPart(, fPart( iPart(, fPart( iPart(, fPart( iPart(, fPart(
iPart( (integer part) returns the integer part or parts of real or complex numbers,
expressions, lists, and matrices.
iPart(value)
fPart( (fractional part) returns the fractional part or parts of real or complex numbers,
expressions, lists, and matrices.