Question: What Is A Selection Control Structure?

What is a case structure?

A Case Structure is a branching control mechanism that allows different executions depending on the value of the label.

The Case Structure is analogous to the Case block in Java or C++ in which, based on what case value the input variable matched, the case structure will choose the correct cases for execution..

Which of the following uses structure?

Linked Lists, Array of structures and Binary Tree uses structure.

What is a selection structure?

Also known as a conditional structure, a selection structure is a programming feature that performs different processes based on whether a boolean condition is true or false. Selection structures use relational operators to test conditions.

What are two forms of a selection control?

A selection type control is one that selects one of two courses of action based on some condition. There are two common forms; the ‘if’ statement and the ‘switch’ statement. The two code segments below demonstrate using these two selection control types to accomplish the same purpose.

What is true of stacking structures?

When you stack structures, the top structure must be a sequence. In programming the loop structure, sequence structure, and selection structures are combined from end to end is called Stacking structure.

What are the 3 types of control structures?

Flow of control through any given function is implemented with three basic types of control structures:Sequential: default mode. … Selection: used for decisions, branching — choosing between 2 or more alternative paths. … Repetition: used for looping, i.e. repeating a piece of code multiple times in a row.

What is another name for a selection structure?

decision structureThe selection structure is also called as decision structure. The Loop structure is used to repeat actions in the program.

What is a control structure in Alice?

A control structure is a programming element that controls which statements in a program are executed and in what order. Types of control structures in Alice are: Sequential: Do in Order. Concurrent: Do Together and Each In_Together. Conditional: If_

What is the difference between if control structure and Select Case control structure?

The difference is that the Select Case control structure basically only make decision on one expression or dimension (for example the examination grade) while the If …ElseIf statement control structure may evaluate only one expression, each If….ElseIf statement may also compute entirely different dimensions.

What is the process of control structures?

Consider what the operating system must know if it is to manage and control a process. At a minimum, a process must include a program or set of programs to be executed. … Associated with these programs is a set of data locations for local and global variables and any defined constants.

Why switch is faster than if else?

Switch is generally faster than a long list of ifs because the compiler can generate a jump table. The longer the list, the better a switch statement is over a series of if statements.

What is difference between switch and if else?

An if-else statement can evaluate almost all the types of data such as integer, floating-point, character, pointer, or Boolean. A switch statement can evaluate either an integer or a character. In the case of ‘if-else’ statement, either the ‘if’ block or the ‘else’ block will be executed based on the condition.

What are the three structures of structured programming?

Structured programming is a program written with only the structured programming constructions: (1) sequence, (2) repetition, and (3) selection.Sequence. Lines or blocks of code are written and executed in sequential order. … Repetition. Repeat a block of code (Action) while a condition is true. … Selection.

What is the purpose of a control structure?

A control structure is like a block of programming that analyses variables and chooses a direction in which to go based on given parameters. The term flow control details the direction the program takes (which way program control “flows”). Hence it is the basic decision-making process in computing; It is a prediction.

What is nested IF statement?

A nested if statement is an if-else statement with another if statement as the if body or the else body. Here’s an example: … If the outer if condition evaluates to true, evaluate the outer if condition.