WEST MIDLANDS | JAN_2025 | IFEANYI MADUBUGWU | MODULE STRUCTUING AND STORING DATA | SPRINT 1 #262
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| @@ -4,3 +4,6 @@ count = count + 1; | |||
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| // Line 1 is a variable declaration, creating the count variable with an initial value of 0 | |||
| // Describe what line 3 is doing, in particular focus on what = is doing | |||
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| //Answer: | |||
| // Line 3 is an expression which calculate the current value of count and also add to 1. | |||
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"... and also add to 1" does not quite make sense. Can you rephrase the statement?
There is a term commonly used in programming to describe operation like count = count + 1. May I suggest feeding the code to ChatGPT to see how else the code can be described? You may be able to learn some programming terms in the process.
| @@ -7,3 +7,6 @@ const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum; | |||
| // Try breaking down the expression and using documentation to explain what it means | |||
| // It will help to think about the order in which expressions are evaluated | |||
| // Try logging the value of num and running the program several times to build an idea of what the program is doing | |||
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| // Answer: | |||
| // The variable num represents a randomly generated whole number between 1 and 100 (inclusive).Since minimum is 1 and maximum is 100, we generate a random number within this range using Math.random(). This function produces a decimal between 0 and 1, which we scale to the desired range.Math.floor() rounds the result down to the nearest whole number, ensuring we get an integer.Each time the code runs, num will hold a different random integer between 1 and 100. | |||
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This function produces a decimal between 0 and 1
The phrase "between 0 and 1" alone is not precise enough in program specification because
it does not state clearly whether 0 and 1 are included in the range.
One concise way to specify a range of values is to use the interval notation.
You can ask ChatGPT "how to specify a range of numbers using interval notation" to learn more about such notation.
Would you try describing the return value of Math.random() and the value of num using this notation?
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| // e) Describe what the expression Number(carPrice.replaceAll(",","")) is doing - what is the purpose of this expression? | ||
| // Answer: we need to remove comma from this expression Number(carPrice.replaceAll(",","")) to allow us convert number to string using .string() method. this allows mathematical expression to work correctly in java. |
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Which part of the expression converts number to string using .string() method?
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Typo?
... in java
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| // e) What do you think the variable result represents? Can you think of a better name for this variable? | ||
| //Answer: this represent a format time string |
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You missed the second part of the question.
Can you think of a better name for this variable?
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| // d) Interpret line 4, what does the expression assigned to totalMinutes mean? | ||
| // Answer: totalMinutes we remove movieLength and remainingSeconds and then divide by 60. |
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Can you rephrase this sentence to make it grammatically correct?
| .substring(paddedPenceNumberString.length - 2) | ||
| .padEnd(2, "0"); | ||
| const penceNumber = parseInt(paddedPenceNumberString, 10); | ||
| // Converts the string to a number to avoid issues. |
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What issues are you referring to?
| What does the syntax `console.log` or `console.assert` mean? In particular, what does the `.` mean? | ||
| // console is an objective, while .log is a method(function) inside the objective console. |
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"objective" is not the same as "object"
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