Difference between revisions of "S2 Cookbook: Numbers"
From Dreamwidth Notes
Foxfirefey (Talk | contribs) |
Foxfirefey (Talk | contribs) |
||
| Line 2: | Line 2: | ||
== Comparing two numbers to see if they are equal or one is lesser/greater == | == Comparing two numbers to see if they are equal or one is lesser/greater == | ||
| + | |||
| + | |||
== Seeing if a number is odd or even == | == Seeing if a number is odd or even == | ||
| + | |||
| + | The <code>mod</code> operation, signified by the <code>%</code> symbol, can tell you if a number is odd or even. Mod a number by 2, and if the result is equal to 1, the number is odd. If the result is equal to 0, the number is even. | ||
| + | |||
| + | <syntaxhighlight lang="s2"> | ||
| + | var int odd = 8; | ||
| + | |||
| + | # prints "Odd" | ||
| + | if( $odd % 2 == 1 ) { | ||
| + | print "Odd"; | ||
| + | } else { | ||
| + | print "Even"; | ||
| + | } | ||
| + | |||
| + | var int even = 6; | ||
| + | |||
| + | # prints "Even" | ||
| + | if( $even % 2 == 0 ) { | ||
| + | print "Even"; | ||
| + | } else { | ||
| + | print "Odd"; | ||
| + | } | ||
| + | </syntaxhighlight> | ||
== Pad a number with 0s to a certain number of digits == | == Pad a number with 0s to a certain number of digits == | ||
| + | |||
| + | Use the <code>zeropad</code> function to get a string that's padded with 0s to a certain number of digits: | ||
| + | |||
| + | <syntaxhighlight lang="s2"> | ||
| + | var int label = 1; | ||
| + | # 001 | ||
| + | print zeropad($label, 3) + "<br />"; | ||
| + | |||
| + | # works on strings that are integers, too! | ||
| + | var string fake_int = "2"; | ||
| + | # 0002 | ||
| + | print zeropad($fake_int, 4) + "<br />"; | ||
| + | |||
| + | # this won't work because "A2" won't convert to an integer correctly | ||
| + | var string fake_label = "A2"; | ||
| + | # 000 | ||
| + | print zeropad($fake_label, 3) + "<br />"; | ||
| + | </syntaxhighlight> | ||
== Get a random number == | == Get a random number == | ||
| + | |||
| + | You can create random numbers using the two kinds of <code>rand</code> functions: | ||
| + | |||
| + | <syntaxhighlight lang="s2"> | ||
| + | # returns a random number between 1 and 10 | ||
| + | var int pick = rand(10); | ||
| + | # returns a random number between 11 and 20 | ||
| + | var int pick2 = rand(11, 20); | ||
| + | # returns a random number between the two random numbers | ||
| + | var int pick3 = rand($pick, $pick2); | ||
| + | </syntaxhighlight> | ||
| + | |||
| + | == Convert a string to an integer == | ||
| + | |||
| + | == Convert an integer to a string == | ||
[[Category: S2 Cookbook]] | [[Category: S2 Cookbook]] | ||
Revision as of 02:32, 8 August 2010
Contents
Arithmetic
Comparing two numbers to see if they are equal or one is lesser/greater
Seeing if a number is odd or even
The mod operation, signified by the % symbol, can tell you if a number is odd or even. Mod a number by 2, and if the result is equal to 1, the number is odd. If the result is equal to 0, the number is even.
var int odd = 8; # prints "Odd" if( $odd % 2 == 1 ) { print "Odd"; } else { print "Even"; } var int even = 6; # prints "Even" if( $even % 2 == 0 ) { print "Even"; } else { print "Odd"; }
Pad a number with 0s to a certain number of digits
Use the zeropad function to get a string that's padded with 0s to a certain number of digits:
var int label = 1; # 001 print zeropad($label, 3) + "<br />"; # works on strings that are integers, too! var string fake_int = "2"; # 0002 print zeropad($fake_int, 4) + "<br />"; # this won't work because "A2" won't convert to an integer correctly var string fake_label = "A2"; # 000 print zeropad($fake_label, 3) + "<br />";
Get a random number
You can create random numbers using the two kinds of rand functions:
# returns a random number between 1 and 10 var int pick = rand(10); # returns a random number between 11 and 20 var int pick2 = rand(11, 20); # returns a random number between the two random numbers var int pick3 = rand($pick, $pick2);
