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Hey there! Ready to level up your coding skills? Let's explore how programmers organize lots of data using lists!
Imagine you are designing a video game and need to store the names of ten high scores. Instead of creating ten separate variables, we use a single list to hold them all together.
A list, or array, is an ordered collection of items stored under one name. Each item has a specific position called an index, which always starts counting at zero.
To solve complex problems, we can use a software design process. We break down the main goal into subproblems, like creating a nested loop to search through rows and columns of data.
Use a software design process to write a nested loop program that searches a 2D grid of student scores to find any score below 60.
- 1. Identify the subproblems: First, we need to loop through each row. Second, we need to loop through each column inside that row.
- 2. Create the outer loop: This loop will keep track of our row index as we move down the grid.
- 3. Create the inner loop: Inside the first loop, make a second loop to check every individual score in the active row.
- 4. Add the condition: Use an 'if' statement to check if the current score at grid[row][col] is less than 60.
- 5. Print the result: If a score is below 60, print its position so teachers can offer support!