Getting type of keys and values of a Dictionary in Julia – keytype() and valtype() Methods

The keytype() is an inbuilt function in julia which is used to return the key type of the specified array.

Syntax:
keytype(A::AbstractArray) 
or 
keytype(T::Type{<:AbstractArray})
Parameters:

• A::AbstractArray: Specified array.
• T::Type{<:AbstractArray}: Specified dictionary type.

Returns: It returns the key type of the specified array. 

Example:

Python

# Julia program to illustrate
# the use of keytype() method

# Getting the key type of the specified array.
println(keytype([5, 10, 15]))
println(keytype([2 4; 6 8]))
println(keytype(Dict(Int32(1) => "GFG")))
println(keytype(Dict(Int8(1) => "gfg")))

Output:

valtype()

The valtype() is an inbuilt function in julia which is used to return the value type of the specified array.

Syntax:
valtype(A::AbstractArray) 
or 
valtype(T::Type{<:AbstractArray})
Parameters:

• A::AbstractArray: Specified array.
• T::Type{<:AbstractArray}: Specified dictionary type.

Returns: It returns the value type of the specified array. 

Example:

Python

# Julia program to illustrate
# the use of valtype() method

# Getting the value type of the specified array.
println(valtype(["Geeks", "GFG", "gfg"]))
println(valtype([1, 2, 3]))
println(valtype(Dict(Int32(1) => "GFG")))
println(valtype(Dict(Int8(1) => 23)))

Output: