#What is the role of the assignment statement?
The assignment statement means an assignment statement. The assignment statement is the most basic statement in the program. Its function is to assign the value of an expression to one or several variables.
The multiple assignment statement assigns the value of the expression to several variables at the same time. In this case, the names of the assigned variables should be written in order on the left side of the assignment number.
Multiple assignment statements assign the value of an expression to several variables at the same time. In this case, the names of the assigned variables should be written in order on the left side of the assignment number. Its general form is: N :=V:=...X:=E, where N,V,...,X——variables of the same type, E——expression.
In the operation of multiple assignment statements, first calculate the subscript appearing in the variable on the left side of the assignment number, then calculate the value of the expression on the right side of the assignment number, and finally assign the value of the expression on the right to all variables on the left .
General form
Form
The general form of multiple assignment statements is:
where N ,V,...,X——variables of the same type; E——expression.
Semantics
The semantics of the above form is to assign the expression on the right to the variables N, V,...,X.
Example
Multiple assignment statement:
The semantics is: assign 1 to three variables A, B, and C at the same time, that is, A: =1, B:=1, C:=1.
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