le, la and les are the french equivalents for the.

As French makes a distinction between "masculine and feminine objects", people use le for masculine things/persons and la for feminine things/persons.

However, in the plural, only les is used whatever the gender is.

Anglais Français the le (m) la (f) les (pl)

Le téléphone > les téléphone s

La télévision > les télévision s

When the following noun begins with a vowel, le or la becomes l'.

L'ordinateur (m) the computer > les ordinateur s

L'île (f) the island > les île s

NB: you may have noticed that making plural is easy: most of the time, it consists in adding an "s" to the noun.