C#.NET — Initialize two variables i and j to 10 each: which statements are valid?

Introduction / Context:
The exercise assesses valid C# initialization forms when you want both variables i and j to be set to 10.

Given Data / Assumptions:

• (1) int i = 10; int j = 10;
• (2) int i, j; i = 10 : j = 10;
• (3) int i = 10, j = 10;
• (4) int i, j = 10;
• (5) int i = j = 10;

Concept / Approach:
Legal, clear initializations are either two separate statements or a compound declaration assigning both. The colon operator in (2) is invalid in this context. In (4) only j is initialized. In (5) chained assignment requires j to already exist in scope.

Step-by-Step Solution:

Verification / Alternative check:
Compile examples (1) and (3) — both succeed; (2), (4), (5) either fail or don’t meet the “both 10” requirement.

Why Other Options Are Wrong:
They include invalid constructs or statements that fail to set both variables to 10.

Common Pitfalls:
Believing chained assignment works inside the same declaration for multiple new identifiers.

Final Answer:
1, 3