Difference between revisions of "Boolean Expressions"

From SCI Wiki
Jump to navigationJump to search
Line 5: Line 5:
 
To illustrate:
 
To illustrate:
 
<div class="CodeBlockHeader">Code:</div>
 
<div class="CodeBlockHeader">Code:</div>
<syntaxhighlight lang="c">
+
<syntaxhighlight lang="sci">
 
(var x)
 
(var x)
  

Revision as of 18:08, 28 November 2015

Originally posted on the SCI Programming forum by Gumby

Boolean (true/false) expressions are handled as one might expect, with one subtlety. A value of 'true' is actually the result any expression evaluating to a non-zero value. I believe this is handled the same as most programming languages, but thought it was worth noting anyway.

To illustrate:

Code:
(var x)

= x 0
(if(x)    // evaluates to false
    Print("True: x is non-zero")
)(else
    Print("False: x is zero")   // this will be output
) 

= x 1
(if(x)    // evaluates to true
    Print("True: x is non-zero") // this will be output
)(else
    Print("False: x is zero")
) 

= x 9387
(if(x)    // also evaluates to true
    Print("True: x is non-zero") // this will be output
)(else
    Print("False: x is zero")
)