• ← Prepend
• → ReplacePart

PrependTo

WMA link

PrependTo[s, item]

prepends item to value of s and sets s to the result.

Assign s to a list

• • s = {1, 2, 4, 9}

Add a new value at the beginning of the list:

• • PrependTo[s, 0]

The value assigned to s has changed:

• • s

PrependTo works with a head other than List:

• • y = f[a, b, c];

• • PrependTo[y, x]

• • y