Students
This is a comparison of the syntax of some popular programming languages, including Scala which we will be using on 5CS004. Where you see the word "TODO", please collaborate to fill in the blank parts of the tables. We will be adding to this page as the module progresses.
Useful language references
Basics
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PHP
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Java
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Scala
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Python
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| Single line comment
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// comment
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// comment
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// comment
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# comment
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| Multi-line comment
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/* comment */
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/* comment */
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/* comment */
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Doesn't have multi-line comments.
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| Null object
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NULL
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null
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TODO
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None
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| +,-,*,/,%,*
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+,-,*,/,%,*
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+,-,*,/,%,*
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+,-,*,/,%,*
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+,-,*,/,%,*
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| True and false
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TRUE, FALSE
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true, false
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TODO
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True, False
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| Boolean operators
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&&, ||, !
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&&, ||, !
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TODO
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and, or, not
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| Relational operators
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<, >, <=, >=, ==, !=
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<, >, <=, >=, ==, !=
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<, >, <=, >=, ==, !=
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<, >, <=, >=, ==, !=
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Selection
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PHP
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Java
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Scala
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Python
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| if/else
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if ($a==$b) {
echo("same");
} else {
echo("different");
}
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if (a==b) {
System.out.println("same");
} else {
System.out.println("different");
}
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TODO
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if a==b:
print 'same'
else:
print 'different'
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| else-if
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if ($a<0) {
echo("negative");
} elseif ($a==0) {
echo("zero");
} else {
echo("positive");
}
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TODO
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TODO
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if a<0:
print 'negative'
elif a==0:
print 'zero'
else:
print 'positive'
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| switch
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switch ($i) {
case 0:
echo "i equals 0";
break;
case 1:
echo "i equals 1";
break;
case 2:
echo "i equals 2";
break;
}
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switch ($i) {
case 0:
System.out.println("i equals 0");
break;
case 1:
System.out.println("i equals 1");
break;
case 2:
System.out.println("i equals 2");
break;
}
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TODO
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Python has no switch statement. Use "if" instead.
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Iteration
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PHP
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Java
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Scala
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Python
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| TODO
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TODO
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TODO
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TODO
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TODO
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Compound types (arrays, lists, etc)
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PHP
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Java
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Scala
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Python
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| TODO
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TODO
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TODO
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TODO
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TODO
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Input / output
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PHP
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Java
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Scala
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Python
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| TODO
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TODO
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TODO
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TODO
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TODO
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Exception handling
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PHP
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Java
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Scala
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Python
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| TODO
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TODO
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TODO
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TODO
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TODO
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Dealing with types
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PHP
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Java
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Scala
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Python
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| TODO
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TODO
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TODO
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TODO
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TODO
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Classes, objects, methods, etc
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PHP
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Java
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Scala
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Python
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| TODO
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TODO
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TODO
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TODO
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TODO
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