for (int i = 1; i <= 3; i++) {
Console.WriteLine($"OTP attempt #{i}");
}List<string> users = new() {"Kunal", "Riya"};
foreach (string user in users) {
Console.WriteLine($"Hi {user}");
}| Loop | When to use | Checks condition |
|---|---|---|
for | Known iterations | Before each loop |
while | Unknown iterations | Before each loop |
do-while | Run at least once | After each loop |
foreach | Loop through collection | Auto |
int attempts = 0;
bool success = false;
while (!success && attempts < 3) {
Console.WriteLine($"Attempt {attempts + 1}");
// success = TryLogin();
attempts++;
}string input;
do {
Console.Write("Enter password: ");
input = Console.ReadLine();
} while (input!= "secret123");for (int i = 1; i <= 10; i++) {
if (i == 3) continue; // Skip 3, go to 4
if (i == 7) break; // Stop loop at 7
Console.WriteLine(i); // Prints: 1,2,4,5,6
}int maxRetries = 3;
for (int i = 0; i < maxRetries; i++) {
try {
var data = CallAPI();
Console.WriteLine("Success");
break; // Exit loop on success
} catch {
if (i == maxRetries - 1) throw; // Last retry failed
Thread.Sleep(1000); // Wait 1 sec before retry
}
}Easy Q1: Which loop for iterating a List?
Medium Q1: How many times does this run?int i=0; do { i++; } while(i < 0);
Hard Q2: Output?for(int i=0; i<5; i++) { if(i==2) continue; Console.Write(i); }
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