=

Two parallel horizontal lines.

=

1. (mathematics) The equal sign. It asserts that two quantities or expressions have the same value.

   2+2=4

2. (chemistry) A double bond; a chemical bond between two chemical elements involving four bonding electrons instead of the usual two.
3. (programming) The assignment operator. It assigns a value to a variable.

   $price=18.95 (this causes $price to be 18.95 from now on)

4. (programming) An operator that compares if two values are equal. In some languages, == is used instead.
5. (lexicography) The same form as the headword.

   sheep pl. =

6. (lexicography) Indicates synonyms of a word.
7. (Hittitology) Indicates morpheme boundaries in bound transcription of Hittite terms with clitics.

For quotations of use of this term, see Citations:=.

• (assignment): :=, ≔, ←
• (compares if equal): ==, ⩵

• (equals): ≠

=

1. (informal) The same as; equal to.

   A wireless keyboard = a keyboard without a wire.

   Vulpes vulpes = red fox.

For quotations of use of this term, see Citations:=.

• (equals): ≠

=

1. Alternative form of ゠