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Language/Type: Java assertions while loops
Author: Marty Stepp (on 2010/12/28)

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.

// Reads many integers from Scanner; returns the
// second smallest integer read.
public static int secondSmallest(Scanner console) { 
    int num = console.nextInt(); 
    int first = num; 
    int second = num; 
    // Point A
    while (num >= 0) {
        // Point B
        if (num < first) {
            second = first; 
            first = num;
            // Point C
        } else if (num < second) { 
            second = num; 

        // Point D
        num = console.nextInt(); 

    // Point E
    return second;

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

num < 0 first < second num >= second
Point A
Point B
Point C
Point D
Point E

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