left at the start and right at the end of the array.maxarea to 0 to keep track of the maximum area found.left is less than right:
a. Calculate the current area as the product of the distance between the pointers and the height of the shorter line.
b. Update maxarea if the current area is greater than the previously recorded maximum area.
c. Move the pointer pointing to the shorter line towards the other end by one step.
d. Repeat the process until left meets right.maxarea as the result.