What is the difference between the = and := operator?
What is the difference between the = and := operator?
The =
and :=
operators serve different purposes in programming languages, and their specific use can vary depending on the language in question.
In many programming languages, the =
operator is known as the assignment operator. It is used to assign the value on the right-hand side to the variable on the left-hand side. For example, in the C programming language, if you write int a = 10;
, you are assigning the value 10
to the variable a
[1].
On the other hand, the :=
operator is often used in contexts where assignment and declaration are combined. For instance, in the Go programming language, :=
is known as the short variable declaration operator. It is used to declare a new variable and assign a value to it in a single step. For example, writing b := 10
declares a new variable b
, infers its type as int
based on the value 10
, and assigns it the value 10
, all at once[4].
In some languages, like SQL, the :=
operator is used to assign a value to a variable, and it is never interpreted as a comparison operator. This is in contrast to the =
operator, which can be interpreted as a comparison operator in certain contexts, such a...
middle
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