While Loop in C with Example | While Loop in C Programming | C Programming Full Playlist (Bangla)
In this video, we dive deep into one of the most fundamental control structures in C programming – the while loop. This is a part of our comprehensive C Programming Full Playlist in Bangla, where we cover all key concepts in C programming, from basics to advanced topics, in simple, easy-to-understand Bangla language. If you're a beginner or even an experienced programmer wanting to solidify your understanding of loops, this tutorial is perfect for you.
What is a While Loop?
A while loop in C is a control flow statement that allows code to be executed repeatedly based on a given condition. The loop continues executing as long as the specified condition remains true. Once the condition becomes false, the loop terminates, and the control is passed to the next line of code after the loop.
The basic syntax of a while loop is:
c
Copy code
while (condition) {
// Code to be executed
}
In simple terms, the while loop will keep executing the block of code inside it as long as the condition evaluates to true. This makes while loops particularly useful when the number of iterations is not known in advance but depends on some external condition.
Key Points of a While Loop:
The loop first checks the condition. If the condition is true, it enters the loop and executes the code inside the block.
After executing the code inside the loop, it re-checks the condition.
If the condition is still true, it repeats the execution.
The process continues until the condition becomes false.
Why Use a While Loop?
While loops are very useful in scenarios where we don’t know in advance how many times the loop should run. For example, reading data from a file until the end of the file, waiting for user input, or performing actions while a specific condition is met.
Practical Example of While Loop:
Here’s another practical example using a while loop. In this program, we’ll keep asking the user for input until they enter a positive number:
Explanation:
The program prompts the user to input a number.
If the user enters a non-positive number (0 or negative), the program enters the while loop and asks for input again.
The loop continues until the user enters a positive number.
Once a positive number is entered, the loop terminates, and a thank-you message is printed.
Conclusion
In this video, we explored the concept of while loops in C programming. We discussed how the while loop works, its syntax, and its practical use cases. Loops are one of the most important control structures in any programming language, and mastering them is crucial for writing efficient code.
Key Takeaways:
A while loop is ideal when the number of iterations isn’t known in advance.
Always ensure that the loop condition will eventually become false to avoid infinite loops.
Use while loops for tasks like reading input, processing data until a condition is met, or running tasks where the loop execution depends on external conditions.
This video is part of our C Programming Full Playlist in Bangla, where we aim to teach programming concepts in a clear and simple way for Bangla-speaking learners. If you found this video helpful, be sure to like, subscribe, and share it with others who are learning programming in C.
For more detailed explanations on loops and other fundamental concepts in C, check out the rest of the playlist!
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