Variables Flashcards
1
Q
How to declare a null-able variable? Is “var {var_ref_name}?;” valid declaration?
A
var {var_ref_name}: type?;
the type must be specifed if the variable will be null-albe.
2
Q
How to declare and initilize variable at in a single line?
A
for mutable variables:
var {var_ref_name} = value
for immutable variables:
val {var_ref_name}: type = value
or
val {var_ref_name} = value
3
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