var testVariable = firstVariable == null ? 0 : 10;
This is an example of a small simple code. I understand vaguely that it is performing somewhat of a similar concept of a conditional statement (just like an if statement). But what do you call this name of coding if it is utilizing the " ? : " symbol?
The ? character is the first part of the ternary conditional operator.
"Ternary" because the expression has three parts, unlike most operators, which are two-part "binary" operators (think addition or assignment) or one-part "unary" operators (think increment ++ or negation !). "Conditional" because the expression evaluates a condition to produce a result.
Reading the linked documentation, we see this exceprt:
Beginning with C# 9.0, conditional expressions are target-typed.
Therefore, the documentation refers to this as a "conditional expression".
