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Computers and TechnologyComputers and Technology
30 August, 15:52

What is the value of the totalsString variable after the following code is executed? var totals = [141.95, 212.95, 411, 10.95]; totals[2] = 312.95; var totalsString = ""; for (var i = 0; i < totals. length; i++) ";

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  1. 30 August, 16:52
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    141.95|212.95|312.95|10.95|

    Explanation:

    Reformatting the code snippet and giving it line numbers;

    1. var totals = [141.95, 212.95, 411, 10.95];

    2. totals[2] = 312.95;

    3. var totalsString = "";

    4. for (var i = 0; i < totals. length; i++) ";

    6.

    Line 1 creates an array called totals with four elements.

    First element = totals[0] = 141.95

    Second element = totals[1] = 212.95

    Third element = totals[2] = 411

    Fourth element = totals[3] = 10.95

    Line 2 replaces the value of the third element totals[2] = 411 with 312.95.

    Therefore the array totals = [141.95, 212.95, 312.95, 10.95]

    Line 3 creates an empty string called totalsString

    Lines 4 - 6 create a for loop that cycles from i=0 to i
    totals. length = 4 (which is the number of items in the array totals)

    This means that the loop cycles from i=0 to i<4

    During cycle 1 when i = 0, the expression inside the for loop executes as follows;

    totalsString = totalsString + totals[0] + "|" / /substitute the values

    totalsString = "" + 141.95 + "|"

    totalsString = 141.95|

    During cycle 2 when i = 1, the expression inside the for loop executes as follows;

    totalsString = totalsString + totals[1] + "|" / /substitute the values

    totalsString = "141.95|" + 212.95 + "|"

    totalsString = 141.95|212.95|

    During cycle 3 when i = 2, the expression inside the for loop executes as follows;

    totalsString = totalsString + totals[2] + "|" / /substitute the values

    totalsString = "141.95|212.95|" + 312.95 + "|"

    totalsString = 141.95|212.95|312.95|

    During cycle 4 when i = 3, the expression inside the for loop executes as follows;

    totalsString = totalsString + totals[3] + "|" / /substitute the values

    totalsString = "141.95|212.95|312.95|" + 10.95 + "|"

    totalsString = 141.95|212.95|312.95|10.95|

    At the end of the execution, totalsString = 141.95|212.95|312.95|10.95|
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