Flowchart For While Loop in C
In this article, we will discuss the flowchart for the While loop in C with its structure, syntax, and example.
Purpose of while loop:
A programmer can repeatedly run a block of code using the while loop's control flow statement up until a certain condition is satisfied. It is helpful for actions that must be carried out a specific number of times or up until a specific condition is met.
Structure
In C, a while loop has the following syntax:
while (<condition>) {
// statements to be executed repeatedly
}
An expression that can only be evaluated as true or false is the condition. The statements in the body of the loop are carried out if the circumstance is true. After that, the situation is assessed once more. The cycle repeats until the case is false, at which time it stops.
Execution:
There are three stages to a while loop's execution:
- Check for conditions: The situation is assessed. If the case is true, the instructions included in the body of the loop are carried out. If not, the loop comes to an end.
- Statements in the body of the loop are carried out.
- Iteration: A second check is made of the condition. If the condition is satisfied, the statements in the body of the loop are once more performed. If not, the loop comes to an end.
- The body of the loop is iterated through until the condition is false. Accordingly, the number of times the loop body is run depends on the result of the condition.
Example:
Here is a C while loop that prints a number from 1 to 10 as an example:
#include <stdio.h>
int main(){
int i = 1;
while (i<= 10) {
printf("%d\n", i);
i++;
}
return 0;
}
Output:
![Flowchart For While Loop in C](https://static.tutorialandexample.com/c/flowchart-for-while-loop-in-c1.png)
Explanation:
In this example, the prerequisite is i = 10. As long as the quantity of i is below or equal to 10, the body of the loop will be run. The body of the loop increments i by 1 after printing the value of "i" to the console. Until i exceed 10, this process is repeated at the point when the loop comes to an end.
Symbols for Flowchart:
Process, decision, input/output, or connector symbols for flowcharts:
Start/End:
![Flowchart For While Loop in C](https://static.tutorialandexample.com/c/flowchart-for-while-loop-in-c2.png)
This symbol is used in the start and end of the flowchart.
Rectangle:
![Flowchart For While Loop in C](https://static.tutorialandexample.com/c/flowchart-for-while-loop-in-c3.png)
A rectangle serves as a symbol for a process or operation. It is the most typical flowchart symbol.
Diamond:
![Flowchart For While Loop in C](https://static.tutorialandexample.com/c/flowchart-for-while-loop-in-c4.png)
A diamond is a metaphor for a decision. This symbol denotes a place in the flowchart when a choice needs to be made. A yes-or-no or true-or-false inquiry usually serves as the basis for the choice.
Parallelogram:
![Flowchart For While Loop in C](https://static.tutorialandexample.com/c/flowchart-for-while-loop-in-c5.png)
A parallelogram is used to depict an input or output. This symbol represents either input or output information flowing into or out of a system.
Arrow:
![Flowchart For While Loop in C](https://static.tutorialandexample.com/c/flowchart-for-while-loop-in-c6.png)
An arrow is used to signify a connector. This icon is used to link up the various components of a flowchart.
On-page Connector:
![Flowchart For While Loop in C](https://static.tutorialandexample.com/c/flowchart-for-while-loop-in-c7.png)
A flowchart symbol is known as an on-page connector in C. It is employed to link two or more sections of a flowchart that are located on the same page. It is helpful for long or complex flowcharts and can make the chart simpler to read and comprehend.
Predefined Process:
![Flowchart For While Loop in C](https://static.tutorialandexample.com/c/flowchart-for-while-loop-in-c8.png)
A process or set of steps that have already been described elsewhere is represented in flowcharts by predefined processes. These two benefits make it useful:
- Not having to repeat the process definition in the flowchart saves time and space.
- It enables the flowchart to become more modular, which facilitates maintenance and understanding.
Off-page Connector:
![Flowchart For While Loop in C](https://static.tutorialandexample.com/c/flowchart-for-while-loop-in-c9.png)
A flowchart's off-page connector is a symbol used to link two or more sections that are on various pages. It is helpful for long or complex flowcharts and can make the chart simpler to read and comprehend.
The choice point has more than two alternative outcomes and is represented by the diamond symbol, a unique form of decision symbol. Usually, this symbol is used to indicate choices made in response to a multiple-choice query.
The following is a step-by-step tutorial on drawing a flowchart using a while loop:
- With a start symbol, begin. The word "Start" is enclosed in a circle.
- Add a sign for judgement. The word "Condition" is written inside of a diamond.
- In the decision symbol, enter the while loop's condition. Typically, the condition is a Boolean operator that can only be true or false.
- Give the body of the loop a process symbol. It has the phrase "Loop body" inside of a rectangle.
- Connect the choice symbol with the process symbol using a connection. It means that if the case is true, the loop's body will be run.
- Include a link connecting the decision sign back to the process symbol. It means that following the execution of the loop body, the condition will once again be assessed.
- Insert an ending symbol. The word "End" is enclosed in a circle.
![Flowchart For While Loop in C](https://static.tutorialandexample.com/c/flowchart-for-while-loop-in-c10.png)
Explanation of Diamond Symbol:
Flowcharts that use the diamond symbol to express conditions and pictures of various circumstances and their results:
In flowcharts, decisions are made by using conditional statements. They are symbolized by the diamond symbol, commonly known as the decision symbol. The question or requirement that is contained in the diamond symbol must be satisfied. The flowchart's direction depends on the response to the question.
Whether an event is true or false determines whether a certain result will occur. The flowchart will take the route that results in a yes answer if the scenario is true. The flowchart will take the route that results in the no response if the scenario is false.
Here are some instances of circumstances and their results:
- Whether the number is even.
The flowchart will choose the path which leads to yes response if the value is even. The flowchart will take the route that results in no response if the integer is odd.
- The user must be logged in.
The flowchart will take the path which leads to yes response if the person using it is logged in. The flowchart will take the path that results in no response if the user fails to log in.
- Are there more than 10 characters in the input?
If the value entered exceeds 10, the diagram will take the route that results in a yes response. The flowchart will take the route leading to no response if the input value is below or equal to 10.
Working of a While Loop:
Here is a detailed description of how a while loop works and when it ends, as well as how to depict those events in a flowchart:
Iteration is the act of repeatedly following a set of rules. Iteration is symbolized by the loop symbol in a flowchart. A prerequisite for the loop's continuation is represented by the loop symbol. The loop's body is run once again if the criteria are satisfied. The loop ends if the requirement is not satisfied.
The act of ending the loop is known as termination. An exit symbol in a flowchart indicates that a process has come to an end. The flowchart will move on to the following step after the loop has ended, as shown by the exit symbol.
Following is the progression of the loop:
- The state is assessed.
- The body of the loop is run if the requirement is satisfied.
- The body of the loop is iterated through until the circumstance is false.
- The loop ends if the condition is false.
Nested While Loop:
The while loop that is enclosed in another while loop is referred to as a nested while loop. Until the scenario is false, the internal while loop is continually run. It is continually run until the outer while loop's condition is false. The inner while loop is run once for each repetition of the outer while loop.
Norms for creating and understanding nested loop flowcharts:
It's crucial to specify each loop's function when creating a diagram with nested loops. The flowchart's overall direction should be controlled by the outer while loop. Use the inner while loop to carry out a specific action connected to the outside while loop.
When creating a flowchart containing nested loops, it's crucial to utilize simple, obvious symbols. The scenario for each if loop should be represented by the diamond symbol. For each while loop, the rectangular symbol ought to be used to indicate the loop body. Utilize the connector symbol to connect the various components of the flowchart.
It's crucial to begin at the starting point of the diagram and follow the arrows all the way to the end when understanding one with nested loops. Regarding each while loop's circumstances, it's crucial to pay attention. If the condition is true, the flowchart will solely execute the loop's body for every while loop.
Uses of Flowchart:
Following are some recommended practices for flowchart clarity, along with advice on how to maintain them clear and simple to comprehend and on how to name symbols and connectors clearly:
Use simple and clear symbols: Simple and clear symbols should be utilized in flowcharts. Even those who are unfamiliar with flowcharts should be able to understand the symbols.
Format a flowchart consistently: A flowchart should have consistent formatting. The same connectors, symbols, and font should be used throughout the flowchart.
Use labels: The diagram has to have distinct labels. The labels on each component of the flowchart should be clear and aid in describing their function.
Employ comments: The diagram should employ comments to clarify any challenging or crucial elements. The feedback ought to be easy to read and should be both clear and concise.
Use a consistent naming scheme: The connectors and symbols in the flowchart should all have the same name. The flowchart will become simpler to read and maintain as a result.
Use a flowcharting tool: Here are several tools available to assist you build flowcharts that are clear and concise. You can use these tools to structure your flowcharts consistently with simple, clear symbols.