Programming Loops in C++

Types of Loops

• For Loop: Used to execute a block of code repeatedly for a specified number of iterations.
  • Syntax: for (init; cond; incr) { body }
  • Example: for (int i = 0; i < 5; i++) { cout << i << endl; }
• While Loop: Used to execute a block of code repeatedly while a condition is true.
  • Syntax: while (cond) { body }
  • Example: int i = 0; while (i < 5) { cout << i << endl; i++; }
• Do-While Loop: Used to execute a block of code repeatedly while a condition is true.
  • Syntax: do { body } while (cond);
  • Example: int i = 0; do { cout << i << endl; i++; } while (i < 5);

Loop Control Statements

• Break: Used to exit the loop prematurely.
  • Example: for (int i = 0; i < 5; i++) { if (i == 3) break; cout << i << endl; }
• Continue: Used to skip the current iteration and move to the next one.
  • Example: for (int i = 0; i < 5; i++) { if (i == 3) continue; cout << i << endl; }
• Return: Used to exit the loop and the function.
  • Example: for (int i = 0; i < 5; i++) { if (i == 3) return; cout << i << endl; }

Loop Best Practices

• Use meaningful loop variable names: Use names that indicate the purpose of the loop variable.
• Avoid complex loop conditions: Keep the loop condition simple and easy to understand.
• Use loop invariants: Use a consistent variable naming convention throughout the loop.
• Avoid infinite loops: Make sure the loop has a termination condition to avoid infinite loops.
• Use loop control statements judiciously: Use break, continue, and return statements sparingly and only when necessary.

Types of Loops

• For Loop is a type of loop used to execute a block of code repeatedly for a specified number of iterations.
• For Loop Syntax: for (init; cond; incr) { body }
• Example of For Loop: for (int i = 0; i < 5; i++) { cout ... }, which initializes a variable i to 0, checks the condition i < 5, increments i by 1, and executes the code within the loop until the condition is met.