Computer Programming with GNU Smalltalk - Free
Computer Programming with GNU Smalltalk - Free
Computer Programming with GNU Smalltalk - Free
Create successful ePaper yourself
Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.
30 <strong>Computer</strong> <strong>Programming</strong> <strong>with</strong> <strong>GNU</strong> <strong>Smalltalk</strong><br />
0.0<br />
3.1 integerPart<br />
3.0<br />
truncated<br />
To truncate a decimal number we use truncated message:<br />
17.2 truncated<br />
17<br />
Note that this is not rounding:<br />
17.6 truncated<br />
17<br />
To round decimal numbers we use...<br />
rounded<br />
rounded message:<br />
17.6 rounded<br />
18<br />
Let us see some messages special to fractional numbers.<br />
denominator<br />
To get the denominator of a fractional number we use denominator message:<br />
3<br />
(3/4) denominator<br />
Notice that we parenthesized the expression 3/4. The reason is that if we didn't do that then the unary<br />
message denominator would be calculated before the expression 3/4 because, as we said before,<br />
unary messages are evaluated before binary messages.<br />
numerator<br />
We use numerator message to get the numerator of a fractional number:<br />
4<br />
(3/4) numerator
Change language