({{, (RefLink[Subscript, paclet:ref/Subscript])[x,y]
is an object that formats as (Subscript[x, y]). }, {, (RefLink[Subscript, paclet:ref/Subscript])[x,(Subscript[y, 1]),(Subscript[y, 2]),…] 
formats as (Subscript[x, (Subscript[y, 1]),(Subscript[y, 2]),…]).}})

OpenersNotesSection(Spacer1)Details

In a notebook, a subscript can be created using (Key1[ctrl, _]) or (Key1[ctrl, -]). (Key1[ctrl, space]) moves out of the subscript position.

Input of the form (Subscript[x, y]) in a notebook is interpreted as (RefLink[Subscript, paclet:ref/Subscript])[x,y].

(RefLink[Subscript, paclet:ref/Subscript])[x,y] formats as (Subscript[x, y]) in (RefLink[StandardForm, paclet:ref/StandardForm]) and (RefLink[TraditionalForm, paclet:ref/TraditionalForm]).

In (RefLink[InputForm, paclet:ref/InputForm]), (RefLink[Subscript, paclet:ref/Subscript])[x,y] formats literally as (RefLink[Subscript, paclet:ref/Subscript])[x,y].

The baseline of (RefLink[Subscript, paclet:ref/Subscript])[x,y] is taken to be the baseline of x.

(RefLink[Subscript, paclet:ref/Subscript])[x,y] is normally output with y in a smaller font than x.

OpenersPrimaryExamplesSection(Spacer1)Examples  (3)

OpenersExampleSection0(Spacer1)Basic Examples  (3)

Generate a subscript:

Subscript[a,n]

To enter directly enter a (Key1[ctrl, -]) n:

(Subscript[a, n])

A matrix of subscripted elements:

Array[Subscript[a,#1,#2]&,{3,3}]//MatrixForm

({{DocumentationFooterIconsRelatedFunction.png, ({{See Also}, {(RefLink[Superscript, paclet:ref/Superscript])  ▪  (RefLink[Subsuperscript, paclet:ref/Subsuperscript])  ▪  (RefLink[Underscript, paclet:ref/Underscript])  ▪  (RefLink[ScriptSizeMultipliers, paclet:ref/ScriptSizeMultipliers])  ▪  (RefLink[SubscriptBox, paclet:ref/SubscriptBox])}})}})

({{DocumentationFooterIconsRelatedTutorial.png, ({{Tutorials}, {▪(RefLinkPlain[Operators without Built-in Meanings, paclet:tutorial/OperatorsWithoutBuiltInMeanings])}, {▪(RefLinkPlain[Names of Symbols and Mathematical Objects, paclet:tutorial/NamesOfSymbolsAndMathematicalObjects])}, {▪(RefLinkPlain[Formatted Output, paclet:tutorial/FormattedOutput])}, {▪(RefLinkPlain[Typing Subscripts, paclet:tutorial/TypingSubscripts])}})}})

({{DocumentationFooterIconsRelatedGuide.png, ({{Related Guides}, {▪(RefLinkPlain[Mathematical Typesetting, paclet:guide/MathematicalTypesetting])}, {▪(RefLinkPlain[Symbolic Notational Forms, paclet:guide/SymbolicNotationalForms])}, {▪(RefLinkPlain[Defining Custom Notation, paclet:guide/DefiningCustomNotation])}})}})