What is the final value of y? int x = 77; int y = 4; if (x == 77) { y = y + 1; } if (x 77) { y = y + 1; } y = y + 1;

Question

What is the final value of y?

int x = 77;
int y = 4;
if (x == 77) {
   y = y + 1;
}
if (x < 100) {
   y = y + 1;
}
if (x > 77) {
   y = y + 1;
}
y = y + 1;

BlackTom AI · Accepted Answer

x has the value 77, so evaluate each if-statement in sequence and update y accordingly. 1) Relevant concepts: - A double equals (==) tests equality, < and > test order, and each if is evaluated independently (they are not chained as else-if). - Integer assignment and incremental update y = y + 1 increases y by one each time the statement executes. 2) Step-by-step execution with intermediate values: - Initial state: x = 77, y = 4. - First if: if (x == 77) — check equality. Since x is 77, this condition is true. Execute body: y = y + 1. - y becomes 4 + 1 = 5. - Second if: if (x < 100) — check less-than. 77 < 100 is true. Execute body: y = y + 1. - y becomes 5 + 1 = 6. - Third if: if (x > 77) — check greater-than. 77 > 77 is false (because 77 is not greater than itself). The body is skipped; y remains 6. - Final statement: y = y + 1 executes unconditionally. - y becomes 6 + 1 = 7. 3) Calculation summary (each update shown): - Start: y = 4 - After first if: y = 4 + 1 = 5 - After second if: y = 5 + 1 = 6 - Third if: skipped (condition false) → y = 6 - Final increment: y = 6 + 1 = 7 4) Why the correct answer is correct: Because exactly two of the three conditional increments run (the equality and the less-than checks), and a final unconditional increment runs, the net increase is +3 from the initial 4 → final 7. 5) Why the other options are incorrect: - 8 would require all three conditionals to be true (or an extra increment), but the third condition (x > 77) is false, so one increment is missing. - 5 would be the result if only one conditional executed (but two conditionals are true). - 6 would be the result if the final unconditional increment were omitted (but it executes), so the actual value is one higher. Final confirmation: the final value of y is 7, matching the provided answer.

What is the final value of y? int x = 77; int y = 4; if (x == 77) { y = y + 1; } if (x < 100) { y = y + 1; } if (x > 77) { y = y + 1; } y = y + 1;单项选择题

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