While there are no strict rules for writing pseudocode, several conventions are commonly followed in the field of DAA:

1. Indentation: Indentation is used to represent the hierarchical structure of the algorithm. Each level of indentation typically corresponds to a nested block of code, making it easier to visualize the flow of control.
2. Variables and Data Types: Descriptive variable names are used to represent data elements and their types. Common data types such as integers, floats, strings, and arrays are often used, along with appropriate annotations to indicate their purpose.
3. Control Structures: Pseudocode employs familiar control structures such as loops (e.g., for, while) and conditionals (e.g., if-else) to express iterative and conditional logic. These structures help define the sequence of steps in the algorithm and handle various decision-making scenarios.
4. Comments: Comments are interspersed throughout the pseudocode to provide additional explanations and clarifications. They help elucidate the rationale behind certain decisions, highlight key insights, and document any assumptions or constraints.
5. Modularity and Functions: Pseudocode promotes modular design by encapsulating reusable functionality within functions or procedures. Functions are defined with clear input and output parameters, allowing them to be invoked and composed to accomplish larger tasks.
6. Error Handling: Error handling mechanisms, such as try-catch blocks or error codes, may be included in pseudocode to address exceptional scenarios and ensure robustness.

Example of Pseudocode:
Let’s illustrate these conventions with a simple example of computing the factorial of a non-negative integer:

function factorial(n)
if n == 0
return 1
else
return n * factorial(n - 1)

In this pseudocode snippet, we define a recursive function factorial that computes the factorial of a given integer n. The base case (if n == 0) terminates the recursion, while the recursive step (return n * factorial(n – 1)) computes the factorial by recursively calling the function with a decremented argument.