In Julia, you can check if a value is null using the isnothing() function. Here's an example:
x = nothing
if isnothing(x)
println("x is null")
else
println("x is not null")
end
Output:
x is null
You can check if a value is true or false using the standard boolean operators (&& and ||) or with the ! operator. Here's an example:
x = true
y = false
if x && !y
println("Both x and y are true")
else
println("Either x or y is false")
end
Output:
Both x and y are true
You can also check if a value is true or false with the is operator. Here's an example:
x = true
if x isa Bool
if x
println("x is true")
else
println("x is false")
end
else
println("x is not a boolean value")
end
Output:
x is true