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In this post, we will explain the different kinds of loops in C# for beginners.

What're Loops?

  • Loops mean repetition, looping back over the same block of code again and again.
  • A loop statement allows us to execute a statement or group of statements multiple times.
  • Loops can execute a block of code as long as a specified condition is reached.

Loops Type

There are four types of loops in C#:

  1. While loop: Loops through a block of code as long as a specified condition is True.
  2. For loop: When you know exactly how many times you want to loop through a block of code.
  3. Foreach loop:  operates on collections of items like arrays or any other built-in list types.
  4. Do/While loop: Will execute the code block once, before checking if the condition is true, then it will repeat the loop as long as the condition is true.

While Loop in C#

  • The while loop loops through a block of code as long as a specified condition is True.

The syntax of a while loop in C# is:

while(condition) {
   statement(s);
}

For Loop in C#

  • You should use the For loop when you know exactly how many times you want to loop through a block of code.

The syntax of For loop in C# is:

for ( init; condition; increment ) {
   statement(s);
}
  • Init: is executed (one time) before the execution of the code block.
  • Condition: defines the condition for executing the code block.
  • Increment: is executed (every time) after the code block has been executed.

For Loop In C# 


Foreach loop in C#

  • Foreach is a C# loop that operates on collections of items like arrays or any other built-in list types.
  • It iterates throw the items of the array or collections.
  • It is an alternative to the For loop.

The syntax of Foreach loop in c#

foreach (element in iterable-item)
{
    // body of foreach loop
}

In this example, we have used foreach statement to iterate over the array numbers then print its items.

foreach loop in c#


Do / While Loop in C#

  • Do/While loop executes the code block once, before checking if the condition is true, then it will repeat the loop as long as the condition is true.

The syntax of a do...while loop in C# is:

do
{
  // code block to be executed
}
while (condition);

Do While In C#


Conclusion 

In this post, we have discussed the different types of loop in C# and when we can use it.

See Also


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