if Statement

An if statement evaluates a boolean condition and runs its block only when that condition is true. Use braces even for a one-line body to keep later edits safe. Strict comparisons make checks for specific values more predictable than relying on truthiness. Keep the condition focused and move multi-step business rules into a named function. Further guidance Test each branch with a normal value, a boundary value, and an unexpected value. Order range checks from specific to broad, make the fallback behavior intentional, and keep related decisions readable. A condition should use validated data rather than an untrusted request value directly. Practice task: Create a fresh example for if Statement. Predict the result before running it, then change one input and explain why the result changes. Test a normal case and one boundary or invalid case where it applies. Compare your output with the example and note one rule you would use in a real project.