Control Structures & Loops Survival Kit

Decision making (if, if-else, switch), loops (for, while, do-while).

Control Flow in C

Mastering conditional branching (if, if-else, switch) and repetitive execution logic (for, while, do-while).

Key Definitions

Decision Making

Constructs to alter flow: if, if-else, switch, nested if.

Loops

For (definite), while (pre-test), do-while (post-test).

Break/Continue

Control keywords to terminate or skip loop iterations.

Core Formulas & Logic

Loop Structure

for(init; cond; inc) { ... }

Switch Case

switch(expression) { case val: ... break; default: ... }

Board Exam PYQs

Nested Loops (10 Marks)

Write a program to print a pyramid pattern using nested loops.

Switch-Case (5 Marks)

Explain the switch statement with a program.

1-Day Prep Strategies

Revision Points

  • do-while executes at least once
  • break exits loop completely
  • continue skips to next iteration
  • switch constant expressions only (int/char)

Memory Trick

"S-D-A: Switch, Decision, Assignment (Flow control basics). Break breaks the loop, Continue continues the loop."

Exam-Time Strategy

Ensure the loop termination condition is correct to avoid infinite loops. Always use {} for block statements to avoid dangling else problems.

Interactive Viva Cards

Decision Making?

If, if-else-if ladder, nested if, switch statement.

Iteration?

For loop (definite), while loop (indefinite), do-while loop (post-test).

Interactive Practice Unit Quiz

UNIT TEST

Test your mastery of this unit's concepts with flash feedback and explanations.