Chapter 7: Problem 82

T F You can use the [] operator to insert a value into a vector that has no elements.

Short Answer

Expert verified

Answer: False

Step by step solution

Understanding Vectors

Vectors are a sequence of elements and are represented by a list of numbers. In some programming languages, we can use the brackets [] to denote an empty vector. For example, in Python or JavaScript, we can declare a vector v = [] to create a new empty vector.

Understanding the [] Operator

The [] operator is often referred to as the index operator because it is used to access the elements of a vector based on their index. For example, in most programming languages like Python or JavaScript, if we have a vector v = [1, 2, 3], we can access the first element (1) with v[0], the second element (2) with v[1], and so on.

Inserting an Element to an Empty Vector Using the [] Operator

We cannot directly use the [] operator to insert a value into a vector that has no elements. This is because the [] operator is used to access or change existing elements, not to append new elements. However, we can use append() function or += operator depending on the programming language to add elements to an empty vector. For example, in Python, we can use append() function as follows: ``` v = [] v.append(1) ``` And in JavaScript, we can use the push() function: ``` let v = []; v.push(1); ``` T F: False

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T F You can use the [] operator to insert a value into a vector that has no elements.

Short Answer

Step by step solution

Understanding Vectors

Understanding the [] Operator

Inserting an Element to an Empty Vector Using the [] Operator

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