# Control Structures Used in Algorithm| What is Control Structures in algorithms? In this post control structures used in programming, control structure types, control structures in c++, control structures in java, control structures in python, control structures in c programming pdf.

# Control Structures Used in Algorithm

An algorithm has a finite number of steps. Some steps may involve decision-making and repetition Broadly speaking, an algorithm may employ one of the

## Following control structures:

### (a)Sequence

By sequence, we mean that each step of an algorithm is executed in a specified order. Let us write an algorithm to add two numbers. This algorithm performs the steps in purely sequential order, as shown in Fig.

### (b)Decision

Decision statements are used when the execution of a process depends on the outcome of some condition. For

example, if x=y, then print EQUAL. So the general form of IF construct can be given as:

IF condition Then process

A condition in this context is any statement that may evaluate to either a true value or a false value. In the above example, a variable x can be either equal to y or not equal to y. However, it cannot be both true and false. If the condition is true, then the process is executed. A decision statement can also be stated in the following manner:

IF condition

Then process 1

ELSE process 2

This form is popularly known as the IF-ELSE construct. Here, if the condition is true, then process 1 is executed, else process 2 is executed. The below Figure shows an algorithm to check if two numbers are equal.

### (c) Repetition

Repetition, which involves executing one or more steps a number of times, can be implemented using constructs such as while, do-while, and for loops. These loops execute one or more steps until some condition is true. The below Figure shows an algorithm that prints the first 10 natural numbers.

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