Python Control Flow Cheat Sheet
Master conditional statements, loops, and loop control structures in Python. Learn if-else, for, while, break, and continue.
Conditionals and Logical Branching
Constructs to evaluate assertions and guide the code execution flow path.
| Method | Syntax | Description |
|---|---|---|
| if / elif / else | if cond1: ... elif cond2: ... else: ... | Evaluates logical pathways in descending order. |
| match-case | match variable: case pattern: ... | Structural pattern matching introduced in Python 3.10 to evaluate variable schemas. |
| Ternary Expression | value_if_true if condition else value_if_false | Inline single-line condition execution. |
Loops & Loop Interrupts
Iterative loop systems and techniques to alter or terminate their execution.
| Method | Syntax | Description |
|---|---|---|
| for | for item in iterable: | Iterates sequentially through elements of a sequence. |
| while | while condition: | Executes instructions repeatedly as long as the conditional remains True. |
| break | break | Exits the innermost containing loop immediately. |
| continue | continue | Skips the remaining code inside the current loop iteration and moves to the next iteration. |
| pass | pass | A null placeholder statement used to fulfill block indentation rules without executing code. |
| Loop else | for ... else: ... | Executes the else block only if the loop completes without meeting a break statement. |
Frequently Asked Questions
What is match-case in Python?
Added in Python 3.10, match-case is Python's structural pattern matching statement, similar to switch-case statements in other languages.
How does the else block work with a for or while loop?
The else block runs only if the loop completes normally without encountering a break statement.
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