Assignment-5

Assigment-5/problem-1.js

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+// Problem-Statement-1
+
+// What is the difference between i++ and ++i
+
+// i++ is post incremental value 
+//i++ is post increment because it increments i's value by 1 after the operation is over.
+// Here the value of i will be assigned to j first, and then i will be incremented.
+
+let i=1;
+let j;
+j=i++
+console.log(i,j)
+// here j value is constant 
+
+
+// ++i is pre incremental value 
+//++i is pre increment because it increments i's value by 1 before the operation. It means j = i; will execute after i++.
+
+let u=1;
+let v;
+v=++u
+console.log(u,v) // 2,2
+
+
+

Assigment-5/problem2.js

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+// what would happen if you paas index beyond a string or a negative index
+
+let string="naziya"
+console.log(string[9]) // undefined 
+console.log(string[-2]) // undefined
+
+//accessing an index beyond the range or using a negative index will not throw an error. Instead, the result will be undefined

Assigment-5/problem3.js

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+//Do you think JSON.stringify would work for arrays as well? What about nested objects? What happens if we pass numbers, strings, undefined, null to JSON.stringify?
+// JSON.stringify for an object
+
+
+// JSON.stringify works for an array,Result will be array in string format
+let array=["naaz","neha",9,"shivi"]
+console.log(typeof(JSON.stringify(array)))
+
+// Nested Objects 
+
+let company={
+    name:"josh",
+    employee:{
+        name:"naziya",
+        designation:"QA",
+        age:27   }
+
+}
+console.log(JSON.stringify(company))
+
+// pass numbers, strings, undefined, null to JSON.stringify
+let ex;
+console.log((JSON.stringify(6)),typeof(JSON.stringify(6)))        // 6// typeof-string
+console.log(JSON.stringify("naziya"),typeof(JSON.stringify("naziya")))  // "naziya"   // string
+console.log(JSON.stringify(null),typeof(JSON.stringify(null)))       // null ///string
+console.log(JSON.stringify(ex),typeof(JSON.stringify(ex)))         // udefined // undefined 

Assigment-5/problem4.js

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+//What happens if you pass a regular/invalid JSON string to JSON.parse? What will happen if such an invalid function runs in the program? Will other parts of the code execute correctly after that?
+
+// valid json string 
+
+let validJSONString='{"name":"naziya","hobbies":["gym","yoga","bikes"]}'
+let validJSONObject= JSON.parse(validJSONString)
+validJSONObject.name="naaz";
+validJSONObject.city="satara"
+console.log(validJSONObject)
+
+
+//invalid JSON OBJECT
+
+let invalidJSONString='{"name":"neha","age":23,"designation":"dev",}'    // Syntax Error
+// let invalidJSONObject= JSON.parse(invalidJSONString)
+//  invalidJSONObject.name="priya";
+// invalidJSONObject.city="pune"
+// console.log(invalidJSONObject)
+
+
+// Error Handling in Javascript
+
+try{
+ let invalidJSONObject= JSON.parse(invalidJSONString)
+ console.log(invalidJSONObject)
+}
+catch(error){
+    console.error("Error:", error.message);
+}
+console.log("naaz")
+
+/*the JSON.parse call with an invalid JSON string triggers the catch block, and the error message is logged. The code after the try-catch block will continue to execute.
+
+However, if the error is not caught and the exception propagates to the global scope (e.g., it's not within a function with its own try-catch block), it might lead to the termination of the script. Subsequent code in the same script won't be executed.
+
+It's good practice to handle errors gracefully to ensure that the failure of one part of the code doesn't have a cascading effect on the entire application. Always consider using try-catch blocks when working with potentially problematic operations, such as parsing JSON from external sources.*/