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Getting type of keys and values of a Dictionary in Julia – keytype() and valtype() Methods
  • Last Updated : 26 Mar, 2020

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 dictinary type.

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

Example:



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# 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")))

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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 dictinary type.

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

Example:

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# 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)))

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Output:

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