Course of Raku / Essentials / Strings / Variable interpolation

Quiz: String interpolation

Select the strings, where the value of $x is interpolated exactly one time.

1	"The temperature is $x degrees"
0	'Air pressure is $x mmHg'	No interpolation in single quotes.
0	'The value of \$x is $x'	No interpolation and no escaping. It prints The value of \$x is $x.
1	"The value of \$x is $x"	The whole phrase gives, for example, The value of $x is 42.
0	"The value of $x is $x"	$x is interpolated twice here.