For, While, and Do-While Loops

Loops allow repeating a block of code multiple times.

• For loop: Used when the number of iterations is known.
• While loop: Checks the condition before each iteration.
• Do-While loop: Executes the code block at least once.

for (int i = 0; i < 5; i++) {
  cout << i;
}

int j = 0;
while (j < 5) {
  cout << j;
  j++;
}

do {
  cout << j;
  j++;
} while (j < 5);