What is the primary use of the turnLeft() command in Karel programming?

The turnLeft() command in Karel programming is designed to change Karel's direction to the left. When Karel executes this command, it rotates 90 degrees to its left, effectively altering its facing direction without moving from its current location. This ability to change direction is crucial for navigating the grid-based environment that Karel operates in, allowing for more complex movement patterns and interactions with objects like walls or beepers.

In the context of navigating a grid, the direction Karel is facing is fundamental to its ability to traverse both the known and unknown spaces. The command serves as a key building block in programming logic where if-then scenarios or looping constructs might depend on Karel's orientation. Using turnLeft() appropriately can enable Karel to make turns in a maze or maneuver around obstacles efficiently.