Python Control Flow Statements
Control Flow Statements in Python
Control flow statements in Python dictate the order in which the statements are executed in a program. They allow you to execute different blocks of code based on certain conditions, creating a more dynamic and responsive program. The main types of control flow statements in Python include:
- Conditional Statements
- Looping Statements
- Control Statements (break, continue, pass)
1. Conditional Statements
Conditional statements allow you to execute certain pieces of code based on whether a condition is true or false. The primary conditional statements in Python are if
, elif
, and else
.
Syntax
Example
2. Looping Statements
Looping statements are used to repeat a block of code multiple times. The primary looping statements in Python are for
and while
.
a. For Loop
The for
loop iterates over a sequence (like a list, tuple, string, or dictionary).
Syntax
Example
b. While Loop
The while
loop continues to execute as long as a specified condition is true.
Syntax
Example
3. Control Statements
Control statements modify the flow of a loop.
a. Break Statement
The break
statement is used to exit a loop prematurely.
Example
b. Continue Statement
The continue
statement skips the current iteration and moves to the next iteration of the loop.
Example
c. Pass Statement
The pass
statement is a null operation; it’s a placeholder that does nothing when executed. It can be useful in situations where a statement is syntactically required but no action is needed.
Example
Summary of Control Flow Statements
Conditional Statements:
if
: Executes a block of code if the condition is true.elif
: Executes a block of code if the previous conditions were false and this condition is true.else
: Executes a block of code if all previous conditions are false.
Looping Statements:
for
: Iterates over a sequence.while
: Continues to execute as long as the condition is true.
Control Statements:
break
: Exits the loop prematurely.continue
: Skips to the next iteration of the loop.pass
: A null operation; acts as a placeholder.
These control flow statements provide the building blocks for structuring and managing the flow of your Python programs effectively.