Control Structures :

Control structures determine the order in which statements in a program are
executed. They allow programmers to specify alternative execution paths and to
repeat certain operations. C supports three basic types of control structures:
sequence, selection, and repetition.

Sequential execution is the default mode in which statements are executed one
after another. Selection structures allow the program to choose between different
paths of execution based on conditions, while repetition structures enable a
group of statements to be executed multiple times.