Are the rules differnt for if when an assignmentis made to a carrier of that sta

voltsarray[count] == voltage;

Are the rules different for this code or it should be = instead of ==. confused as usual.

Your snippet is meaningless without context.

= is assignment. It changes the value of the thing on the left.

== is comparison. It returns true if the things on either side are equal.

It should be fairly obvious whether you're trying to compare to values or change the value of something.

The single = is an assignment operator. It assigns the value on the right to the variable on the left.

The double == is the equality operator. It compares the two values and returns true or false.

Without context, as AWOL points out, it is impossible to determine which you want to use.

PaulS:
The single = is an assignment operator. It assigns the value on the right to the variable on the left

. . .and evaluates true/false the result of the assignment

. . .and evaluates true/false the result of the assignment

No, it does not. It returns the VALUE assigned.

PaulS: No, it does not. It returns the VALUE assigned.

This evaluates to true.

try it.

int a = 8;

if (a = 0){
   Serial.println("This never gets printed");
}

if (a == 0) {
   Serial.println("Even though the assignment was successful");
}

tnx