Conditionals

• Braces are required
• There are no switch statements like in C / C++

If statement

if (expr) {
    statements;
}
elsif (expr) {
    statements;
}
else {
    statements;
}

single-statement if (expr);

Unless statement

• Logical negation of an if statement: if (!expr)

unless (expr) {
    statements;
}

single-statement unless (expr);