1. for Loop: -
The for loop is used when the number of iterations is known beforehand. It consists of an initialization, condition, and iterator expression. Here's an example of a for loop that prints numbers from 1 to 5:
for (int i = 1; i <= 5; i++)
{
Console.WriteLine(i);
}
2. while Loop: -
The while loop repeats a block of code as long as the specified condition is true. It is suitable when the number of iterations is not known in advance. Here's an example of a while loop that calculates the sum of numbers from 1 to 10:
int sum = 0;
int i = 1;
while (i <= 10)
{
sum += i;
i++;
}
Console.WriteLine("Sum: " + sum);
3. do-while Loop:-
The do-while loop is similar to the while loop, but it guarantees that the block of code is executed at least once before checking the condition. It is useful when you want to execute the loop body first and then check the condition. Here's an example of a do-while loop that prints numbers from 1 to 3:
int j = 1;
do
{
Console.WriteLine(j);
j++;
} while (j <= 3);4. foreach Loop:-
The foreach loop is specifically designed for iterating over collections such as arrays, lists, or other enumerable objects. It simplifies the process of iterating through elements without explicitly managing an index. Here's an example of a foreach loop that iterates over an array of strings:
string[] colors = { "Red", "Green", "Blue" };
foreach (string color in colors)
{
Console.WriteLine(color);
}
These are the fundamental types of loops in C# that cater to different looping scenarios. Understanding when to use each type is crucial for writing efficient and readable code. Experiment with these loops in your C# projects to master their usage and enhance your programming skills.