Part• expr[[i]] or Part[expr, i] gives the  part of expr.
• expr[[-i]] counts from the end.
• expr[[i, j, ... ]] or Part[expr, i, j, ... ] is equivalent to expr[[i]] [[j]] ... .
• expr[[{ ,  , ... }]] gives a list of the parts  ,  , ... of expr. • You can make an assignment like t[[i]] = value to modify part of an expression.
• When expr is a list, expr[[{ ,  , ... }]] gives a list of parts. In general, the head of expr is applied to the list of parts.
• You can get a nested list of parts from expr[[ ,  , ... ]]. Each part has one index from each list.
• expr[[spec]] can be input as expr spec .
•  and  can be entered as  [[ and ]] or \[LeftDoubleBracket] and \[RightDoubleBracket].
• expr[[spec]] can be input as  or  .
• See also: First, Last, Position, Take.
Examples Using InstantCalculatorsHere are the InstantCalculators for the Part function. Enter the parameters for your calculation and click Calculate to see the result.
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Entering Commands DirectlyYou can paste a template for this command via the Text Input button on the Part Function Controller. This finds the third element from the list using the shorthand notation for Part.
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This pulls out a list of elements.
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The second input resets the third element of the list using the special characters for Part.
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Clear the variable definition.
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