1-key-errors Done

Author: M-Abdoon

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

@@ -1,7 +1,11 @@
 // Predict and explain first...
+// the code is supposed to convert a decimal number to percentage by multiplying 
+// the decimal Number by 100 then add the sign % to show that it is a percentage
 
 // Why will an error occur when this program runs?
 // =============> write your prediction here
+// an error will occur because the variable decimalNumber is redeclared inside the function.
+// it's already declared as a parameter of the function, so redeclaring it with const causes a syntax error.
 
 // Try playing computer with the example to work out what is going on
 
@@ -15,6 +19,18 @@ function convertToPercentage(decimalNumber) {
 console.log(decimalNumber);
 
 // =============> write your explanation here
+// the fucntion convertToPercentage has a parameter named decimalNumber,
+// but inside the function, there is a line that tries to declare a new constant with the same name decimalNumber.
+// there is no need to redeclare the variable or edit it since it is a user input.
+// also the variable decimalNumber is called from outside the function which menas from another scope.
+// that is wrong because the variable can only be used inside the fucntion. instead of that we need to call the funtion, not hte variable.
 
 // 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(0.3));

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

@@ -4,17 +4,32 @@
 // this function should square any number but instead we're going to get an error
 
 // =============> write your prediction of the error here
+// the error will occur because the parameter name is a number (3) which is not allowed.
+// it should be a variable or empty.
 
 function square(3) {
     return num * num;
 }
 
 // =============> write the error message here
-
+// SyntaxError: Unexpected number
+//     at internalCompileFunction (node:internal/vm:73:18)
+//     at wrapSafe (node:internal/modules/cjs/loader:1274:20)
+//     at Module._compile (node:internal/modules/cjs/loader:1320:27)
+//     at Module._extensions..js (node:internal/modules/cjs/loader:1414:10)
+//     at Module.load (node:internal/modules/cjs/loader:1197:32)
+//     at Module._load (node:internal/modules/cjs/loader:1013:12)
+//     at Function.executeUserEntryPoint [as runMain] (node:internal/modules/run_main:128:12)
+//     at node:internal/main/run_main_module:28:49
+
+// Node.js v18.19.1
 // =============> explain this error message here
-
+// ther error message says that a number can not put as an input when declaring the function
 // Finally, correct the code to fix the problem
 
 // =============> write your new code here
+function square(num) {
+    return num * num;
+}
 
-
+console.log(square(5));