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BJP4 Self-Check 5.29: assertions3

Language/Type: Java assertions
Author: Leslie Ferguson (on 2016/09/08)

For each of the five points labeled by comments, identify each of the assertions in the table below as either being always true, never true, or sometimes true / sometimes false.

public static int mystery(Scanner console) {
    int prev = 0;
    int count = 0;
    int next = console.nextInt();

    // Point A
    while (next != 0) {
        // Point B
        if (next == prev) {
            // Point C
        prev = next;
        next = console.nextInt();
        // Point D

    // Point E
    return count;

Fill in each box of the the table below with ALWAYS, NEVER or SOMETIMES.

next == 0 prev == 0 next == prev
Point A
Point B
Point C
Point D
Point E

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