Câu hỏi phỏng vấn Golang
Câu hỏi

What is the difference between the = and := operator?

Câu trả lời

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...

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