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All of the standard control structures, such as if statements and while loops, are available in Ruby. The lack of brackets surrounding the bodies of these statements may catch Java, C, and Perl programmers off guard. Ruby, on the other hand, employs the term end to indicate the end of a body.

A control structure is a programming block that analyses variables and determines a course of action depending on provided parameters. The word "flow control" refers to the program's path (which way programme control "flows"). As a result, it is the most fundamental computer decision-making process; it is a prediction.

The default control structure is sequence, in which instructions are performed one after the other. To discover the roots of a quadratic equation ax2 + bx + c = 0, they might do a sequence of arithmetic operations, assigning results to variables.

In C/C++, there are three control statements that can be used to implement loop structures. While, Do while, and For are all statements that can be used.

Overview. A do while loop is a control flow statement that runs a block of code at least once before deciding whether or not to run it again based on a boolean condition at the conclusion of the block.

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