complete bmi.js ,cases.js and to-pounds.js

Author: Enice-Codes

Sprint-2/1-key-errors/0.js

@@ -1,5 +1,7 @@
 // Predict and explain first...
 //  =============> write your prediction here
+// I predict that the code will throw an error because the variable `str` is being declared twice within the same scope, the first in the function perimeter. 
+// and the second declaration is inside the function body.
 
 // call the function capitalise with a string input
 // interpret the error message and figure out why an error is occurring
@@ -10,4 +12,10 @@ function capitalise(str) {
 }
 
 // =============> write your explanation here
+// an error will occur because the variable`str` is being declared  in the same scope,which is not allowed in javascript.
+
 // =============> write your new code here
+function capitalise(str){
+  let newstr = `${newstr[0].toUppercase()}${newstr.slice(1)}`;
+  return str;
+}

Sprint-2/1-key-errors/1.js

@@ -2,6 +2,9 @@
 
 // Why will an error occur when this program runs?
 // =============> write your prediction here
+// I predict that the code will throw an error because the variable `decimalNumber` being declared twice within the same scope,in the function perimeter. 
+// and the second declaration is inside the function body.
+
 
 // Try playing computer with the example to work out what is going on
 
@@ -15,6 +18,22 @@ function convertToPercentage(decimalNumber) {
 console.log(decimalNumber);
 
 // =============> write your explanation here
+// in javascript its not allowed to declare variables twice in the same scope because it creates an error such as `decimalnumber`.
 
 // Finally, correct the code to fix the problem
 // =============> write your new code here
+
+function convertToPercentage(decimalNumber) {
+  const percentage = `${ decimalNumber * 100}%`;
+  return percentage;
+}
+console.log(convertToPercentage(0.5));; 
+
+
+function convertToPercentage(decimalNumber) {
+  const percentage = `${decimalNumber * 100}%`;
+  return percentage;
+}
+
+console.log(convertToPercentage(0.5));
+

Sprint-2/1-key-errors/2.js

@@ -1,20 +1,35 @@
 
 // Predict and explain first BEFORE you run any code...
+// I predict that the error will be a syntax error because the parameter name in the function definition is a number (3) instead variable name.
 
 // this function should square any number but instead we're going to get an error
-
 // =============> write your prediction of the error here
+// I predict that there will be an error when running the code because the return variable has a *.
 
 function square(3) {
     return num * num;
 }
 
 // =============> write the error message here
+//uncaught syntax error :unexpected number .
 
 // =============> explain this error message here
+// Javascript expects a parameter name inside the function parentheses.
+// In the code `function square (3)`, the number 3 is used as a parameter,
+// but parameter names must be valid identifiers (such as num,x or value ).
+// Because of this , javaScript throws the error "unexpected number".
+
 
 // Finally, correct the code to fix the problem
 
-// =============> write your new code here
+ function square (number){
+    return num * num ;
+ }
+ console.log (square(3)); 
 
+// =============> write your new code here
 
+function square (number){
+    return 3 * 3;
+ }
+ console.log (square()); //9

Sprint-2/2-mandatory-debug/0.js

@@ -2,6 +2,9 @@
 
 // =============> write your prediction here
 
+// I predict there will be an error ,the outcome will however br unexpected because the multiply function uses console,log() instead of return.
+// ${multiply(10,32)} evaluates to undefined because the function does not return a value.
+
 function multiply(a, b) {
   console.log(a * b);
 }
@@ -10,5 +13,20 @@ console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
 
 // =============> write your explanation here
 
+//the multiply function uses console,log() instead of return.
+// ${multiply(10,32)} evaluates to undefined because the function does not return a value.
+
 // Finally, correct the code to fix the problem
+
+function multiply(a,b){
+  return (a*b);
+}
+console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);
+
 //  =============> write your new code here
+
+function multiply (a,b){
+  return (a*b);
+}
+
+console.log(`The result of multiplying 10 and 32 is ${multiply(10, 32)}`);

Sprint-2/2-mandatory-debug/1.js

@@ -1,5 +1,6 @@
 // Predict and explain first...
 //  =============> write your prediction here
+// I predict that there will be ann error because the return variable does not have values recieved by sum function .there are values that has not variable 
 
 function sum(a, b) {
   return;
@@ -9,5 +10,19 @@ function sum(a, b) {
 console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);
 
 // =============> write your explanation here
-// Finally, correct the code to fix the problem
+
+// Finally, Correct the code to fix the problem. The function receives the values 10 and 32 as parameters a and b.
+// However, because return is followed by a new line, JavaScript treats it as:
+
+// This causes the function to return  undefined immediately.The expression a + b is never execute.
+// As a result , the template literal prints: 
+"The sum of 10 and 32 is undefined".
+
 //  =============> write your new code here
+
+function sum (a,b){
+return a + b;
+
+}
+
+console.log(`The sum of 10 and 32 is ${sum(10, 32)}`);

Sprint-2/2-mandatory-debug/2.js

@@ -1,7 +1,14 @@
 // Predict and explain first...
+// I predict that all 3 lines will print as last digit of the function does not use the valuable to passed into.
+// instead , it always uses the global variable which is 103.
 
 // Predict the output of the following code:
 // =============> Write your prediction here
+// The function getLastDigit() does not have a parameter , so it cannot use the numbers passed to it when it is called. 
+// when getLastDigit (42), getLastDigit (105),and getLastDigit(806)are executed ,the arguments are ignored because thr function the function does not accept
+// any parameters instead,the function always uses the global variable num, which is 103.
+// 103 converted to a string is "103",and slice(-1) returns the last character ,which is "3".
+// therefore, the function always returns 3 regardless of the number passed in.
 
 const num = 103;
 
@@ -15,10 +22,39 @@ console.log(`The last digit of 806 is ${getLastDigit(806)}`);
 
 // Now run the code and compare the output to your prediction
 // =============> write the output here
+
+// The resource https://chatgpt.com/cdn/assets/root-lmbi4tq1.css# was preloaded using link preload but not used within a few seconds from the window's load event. 
+// Please make sure it has an appropriate `as` value and it is preloaded intentionally.
+(index):1 
+
 // Explain why the output is the way it is
 // =============> write your explanation here
+
+// his message is a browser warning, not a JavaScript error.
+// The browser downloaded (preloaded) the CSS file to make the page load faster,
+// but the stylesheet was not used immediately after the page loaded.
+// Because the preloaded resource was not used within a few seconds,
+// Chrome displays a warning to indicate that the preload may be unnecessary
+// or that the resource might have the wrong "as" attribute.
+// The page can still work correctly even though this warning appears.
+
 // Finally, correct the code to fix the problem
 // =============> write your new code here
 
+function getLastDigit(num) {
+  return num.toString().slice(-1);
+}
+
+console.log(`The last digit of 42 is ${getLastDigit(42)}`);
+console.log(`The last digit of 105 is ${getLastDigit(105)}`);
+console.log(`The last digit of 806 is ${getLastDigit(806)}`);
+
+
 // This program should tell the user the last digit of each number.
 // Explain why getLastDigit is not working properly - correct the problem
+// The original version of getLastDigit was not working properly because it did not accept a parameter.
+// It always used a global variable instead of the number passed into the function.
+// by adding the parameter num,the function now recieves the number that is passed in when it is called.The function converts that number to a string
+// and uses slice (-1) to return the last digit.as a result ,getLastDigit(105) returns 5,and getLastDigital(806) returns 6.
+
+

Sprint-2/3-mandatory-implement/1-bmi.js

@@ -16,4 +16,8 @@
 
 function calculateBMI(weight, height) {
     // return the BMI of someone based off their weight and height
-}
+Const bmi = weight/ (height * height);
+    return Number(bmi.tofixed(1));
+
+}
+console.log( calculateBMI(70.1.73)); //23.4

Sprint-2/3-mandatory-implement/2-cases.js

@@ -4,6 +4,14 @@
 // UPPER_SNAKE_CASE means taking a string and writing it in all caps with underscores instead of spaces.
 
 // Implement a function that:
+function toupperSneakCase (str){
+   return str.toUpperCase() .replaceAll("","_");
+}
+console.log(toupperSneakCase("hello there"));
+//HELLO_THERE
+
+console.log(toupperSneakCase("lord of the rings"));
+//LORD_OF_THE_RINGS
 
 // Given a string input like "hello there"
 // When we call this function with the input string
@@ -14,3 +22,4 @@
 // You will need to come up with an appropriate name for the function
 // Use the MDN string documentation to help you find a solution
 // This might help https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/String/toUpperCase
+

Sprint-2/3-mandatory-implement/3-to-pounds.js

@@ -4,3 +4,27 @@
 // You will need to declare a function called toPounds with an appropriately named parameter.
 
 // You should call this function a number of times to check it works for different inputs
+
+function topounds (penceString){
+    const penceStringWithoutTrailingP = penceString.substring(
+        0,
+        penceString.length - 1
+    );
+}
+
+const paddedPenceNumberString = penceStringWithoutTrailingP.padStart(3,"0");
+const pounds = paddedPenceNumberString.substring (0,
+    paddedPenceNumberString.length - 2 
+);
+const pence = paddedPenceNumberString
+.substring(paddedPenceNumberString.length - 2)
+.padEnd(2,"0");
+
+  return`£${pounds}.${pence}`;
+  
+// Test the Function with different inputs 
+console.log(topounds ("399p")); // £3.99
+console.log(topounds("45p")); //£ 0.45
+console.log(topounds ("7p"));//£0.07
+  console.log (topounds("120p")); // £1.20
+

Sprint-2/4-mandatory-interpret/time-format.js

@@ -22,17 +22,22 @@ function formatTimeDisplay(seconds) {
 
 // a) When formatTimeDisplay is called how many times will pad be called?
 // =============> write your answer here
+// 3 times 
 
 // Call formatTimeDisplay with an input of 61, now answer the following:
 
 // b) What is the value assigned to num when pad is called for the first time?
 // =============> write your answer here
+//0
 
 // c) What is the return value of pad is called for the first time?
 // =============> write your answer here
+//"00"
 
 // d) What is the value assigned to num when pad is called for the last time in this program?  Explain your answer
 // =============> write your answer here
+//1 
 
 // e) What is the return value of pad when it is called for the last time in this program?  Explain your answer
 // =============> write your answer here
+//"01"SSS