BUILT-IN MATHEMATICA SYMBOL

PrependTo

PrependTo[s, elem]
prepends elem to the value of s, and resets s to the result.

Details Details

PrependTo[s, elem] is equivalent to s=Prepend[s, elem].
PrependTo[s, elem] does not evaluate s.
You can use PrependTo repeatedly to build up a list, though Sow and Reap will usually be more efficient. »
PrependTo works on SparseArray objects, returning ordinary lists if necessary. »

Examples Examples open all close all

Basic Examples (1)Basic Examples (1)

Assign l to a list:

Out[1]=

Include a new value at the beginning of the list:

Out[2]=

The value assigned to l has changed:

Out[3]=

Generalizations & Extensions (2)Generalizations & Extensions (2)

Applications (1)Applications (1)

Possible Issues (4)Possible Issues (4)

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See Also See Also

AppendTo Sow AddTo Prepend

Tutorials Tutorials

Special Forms of Assignment

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