Fundamentals of CS I (CS151 2001S) : Reference
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Predicate  exact? 

Parameters  n, a number 
Purpose  Determines if v is an exact number. 
Produces  A truth value: true (#t )
if n is an exact number,
false (#f ) if it's an inexact number.
A number is exact if Scheme represents it exactly (with
no rounding off). 
Preconditions  Only one parameter (verified). n is a number (verified). 
Examples  > (exact? 'a) exact?: expects argument of type <number> given a > (exact? 12.2) #f > (exact? 3) #t > (exact? 3 4) exact?: expects 1 argument, given 2: 3 4 
"..." (double quote)

+ (plus)

#\character (pound backslash)

#\newline

#\space

; (semicolon)
* (times)

abs

and

append

boolean?

car

cdr

char?

char<?

char<=?

char=?

char>=?

char>?

charalphabetic?

charci<?

charci<=?

charci=?

charci>?

charci>=?

char>integer

chardowncase

charlowercase?

charnumeric?

charuppercase?

charupcase

charwhitespace?

complex?

cons

eq?

equal?

eqv?

exact?

exact>inexact

exp

expt

inexact?

integer?

integer>char
length

list

list?

listref

null

null?

number?

procedure?
rational?

real?

reverse
sqrt

string?

symbol?
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[Stone/Spring2000]
Links
Disclaimer: I usually create these pages on the fly. This means that they are rarely proofread and may contain bad grammar and incorrect details. It also means that I may update them regularly (see the history for more details). Feel free to contact me with any suggestions for changes.
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The source was last modified Sun Jan 28 12:28:46 2001.