Types of Statements in Python Programming Language
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The document explains flow control and statements in Python, focusing on the three basic control structures: sequential, selection, and repetition. It discusses various control statements, including if, if..else, and loop constructs such as for and while loops, emphasizing their roles in decision-making and iteration. Additionally, it covers the usage of break and continue statements to modify loop behavior.
![for loop with else
A for loop can have an optional else block as well.
The else part is executed if the items in the
sequence used in for loop exhausts.
digits = [0, 1, 5]
for i in digits:
print(i)
else:
print("No items left.")](https://image.slidesharecdn.com/flowcontrolstatements-201010091527/85/Types-of-Statements-in-Python-Programming-Language-11-320.jpg)
Types of Statements in Python Programming Language
- 1. Flow Control & Statements
- 2. Python control structures According to the structure theorem, any computer program can be written using the basic control structures . A control structure (or flow of control) is a block of programming that analyses variables and chooses a direction in which to go based on given parameters. In simple sentence, a control structure is just a decision that the computer makes. So, it is the basic decision-making process
- 3. Flow of control Flow of control through any given program is implemented with three basic types of control structures: Sequential, Selection Repetition
- 4. Selection Python if statements
- 5. Python if..else statements The else statement is to specify a block of code to be executed, if the condition in the if statement is false. Thus, the else clause ensures that a sequence of statements is executed.
- 7. Python Loop / Iteration Statements Loops are one of the most important features in computer programming languages . As the name suggests is the process that get repeated again and again Every loop has 3 parts: Initialization Condition Updation
- 9. What is for loop in Python? The for loop in Python is used to iterate over a sequence (list, tuple, string) or other iterable objects. Iterating over a sequence is called traversal. Syntax of for Loop for val in sequence: Body of for loop
- 10. The range() function We can generate a sequence of numbers using range() function. range(10) will generate numbers from 0 to 9 (10 numbers). We can also define the start, stop and step size as range(start, stop,step_size). step_size defaults to 1 if not provided. Examples : print(range(10)) Print(list(range(10)) print(list(range(2, 8))) print(list(range(2, 20, 3)))
- 11. for loop with else A for loop can have an optional else block as well. The else part is executed if the items in the sequence used in for loop exhausts. digits = [0, 1, 5] for i in digits: print(i) else: print("No items left.")
- 12. What is while loop in Python? The while loop in Python is used to iterate over a block of code as long as the test expression (condition) is true.
- 13. Python break and continue In Python, break and continue statements can alter the flow of a normal loop. Loops iterate over a block of code until the test expression is false, but sometimes we wish to terminate the current iteration or even the whole loop without checking test expression. The break statement terminates the loop containing it. Control of the program flows to the statement immediately after the body of the loop. The continue statement is used to skip the rest of the code inside a loop for the current iteration only. Loop does not terminate but continues on with the next iteration.
- 14. Python break statement Syntax of break break
- 15. The working of break statement in for loop and while loop is shown below.
- 17. The working of continue statement in for and while loop is shown below.