Sprint 1 coursework solutions

Solouions/Sprint-1/count.js

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+let count = 0;
+
+count = count + 1;
+
+// Describe what line 3 is doing, in particular focus on what = is doing
+
+// Line 3 is performing an assignment, giving a new value to the count variable declared on line 1.
+// The new value is the result of the expression on the right side: count + 1.
+// So this operation is incrementing the count variable by 1, so after this line, count will now have the value 1.
+
+console.log(`The value of count is now: ${count}`);

Solouions/Sprint-1/decimal.js

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+const num = 56.4567;
+
+// Create a variable called wholeNumberPart and assign to it an expression that evaluates to 56
+const wholeNumberPart = Math.floor(num);
+
+// Create a variable called decimalPart and assign to it an expression that evaluates to 0.4567
+const decimalPart = num - wholeNumberPart;
+
+// Create a variable called roundedNum and assign to it an expression that evaluates to 57
+const roundedNum = Math.round(num);
+
+// Log your variables to the console to check your answers
+console.log(`Whole number part: ${wholeNumberPart}`);
+console.log(`Decimal part: ${decimalPart}`);
+console.log(`Rounded number: ${roundedNum}`);

Solouions/Sprint-1/initials.js

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+let firstName = "Creola";
+let middleName = "Katherine";
+let lastName = "Johnson";
+
+// Declare a variable called initials that stores the first character of each string.
+const initials = firstName[0] + middleName[0] + lastName[0];
+
+console.log(`The initials are: ${initials}`);

Solouions/Sprint-1/paths.js

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+// The diagram below shows the different names for parts of a file path on a Unix operating system
+
+// ┌─────────────────────┬────────────┐
+// │          dir        │    base    │
+// ├──────┬              ├──────┬─────┤
+// │ root │              │ name │ ext │
+// "  /    home/user/dir / file  .txt "
+// └──────┴──────────────┴──────┴─────┘
+
+// (All spaces in the "" line should be ignored. They are purely for formatting.)
+
+const filePath = "/Users/mitch/cyf/Module-JS1/week-1/interpret/file.txt";
+const lastSlashIndex = filePath.lastIndexOf("/");
+const base = filePath.slice(lastSlashIndex + 1);
+console.log(`The base part of ${filePath} is ${base}`);
+
+// Create a variable to store the dir part of the filePath variable
+const dir = filePath.slice(0, lastSlashIndex);
+
+// Create a variable to store the ext part of the variable
+const ext = base.slice(base.lastIndexOf("."));
+
+console.log(`The dir part of ${filePath} is ${dir}`);
+console.log(`The ext part of ${filePath} is ${ext}`);

Solouions/Sprint-1/random.js

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+const minimum = 1;
+const maximum = 100;
+
+const num = Math.floor(Math.random() * (maximum - minimum + 1)) + minimum;
+
+// In this exercise, you will need to work out what num represents?
+// 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
+
+// Breaking down the expression:
+// 1. Math.random() generates a random number between 0 and 1
+// 2. We multiply it by (maximum - minimum + 1) to scale it to our range
+// 3. Math.floor() rounds down to the nearest integer
+// 4. We add minimum to shift the range to start from the minimum value
+
+// So num is a random integer between minimum and maximum values.
+
+console.log(`Num is a random number between ${minimum} and ${maximum}: ${num}`);