1. While Loop It is used to execute a block of statement as long as a given condition is true. And when the condition become false, the control will come out of the loop. The condition is checked every time at the beginning of the loop. Syntax while (condition): statement [statements] e.g. x = 1 while (x <= 4): print(x) x = x + 1

In Python a for-loop is used to step through a sequence e.g., count through a series of numbers or step through the lines in a file. for i in range (1, 4, 1): print("i=", i) print("Done!") for i in range (3, 0, -1): print("i = ", i) print("Done!")

Python provides control structures to manage the order of execution of a program, which are if-else, for, while and jump statements like break, continue. Here, Header line starts with the keyword and ends at colon (:). The body consists of more than one simple statements or compound statements.

Jun 4, 2021 · While Loop One way is to use a while loop. It is typical to use a while loop if you don’t know exactly how many times the loop should execute. General form: while condition: statement(s) Meaning: as long as the condition remains true, execute the statements. As usual, all of the statements in the body must be indented the same amount.

While loop in python is conditional loop which repeat the instruction as long as condition remains true. It is entry-controlled loop i.e. it first check the condition and if it is true then allows to enter in loop. Test condition : it is the condition or last value up to which loop will be executed. 4.

Python has two loop constructs, which we call while-loops and for-loops. In this section we will introduce while-loops and in the next section we present for-loops. The remainder of the chapter provides examples of these useful con-structs. A while-loop has the structure: while <condition >: statement block :

Iteration Statements (Loops) 1. While Loop It is used to execute a block of statement as long as a given condition is true. And when the condition become false, the control will come out of the loop. The condition is checked every time at the beginning of the loop. Syntax while (condition): statement [statements] e.g. x = 1 while (x <= 4 ...

Python • A ‘counting loop’: You want a simple loop to count up or down a certain number of times. •For • The most powerful looping construct: you can write a ‘while-do’ loop to mimic the behavior of any other type of loop. In general it should be used when you want a …

Dec 8, 2024 · while Loop. The while loop executes as long as its condition remains true. It’s useful when you don’t know beforehand how many times you’ll need to repeat the code. Example: count = 0 while count < 5: print(count) count += 1 # Increment count; 4. Flowcharts. Flowcharts can be used to visualize the control flow of loops.

Loops in Python V22.0002-001 Summary • Loops provide a way to repeat blocks of instructions • While loops are the most general –They require a condition for exiting the loop •If the condition is never true, the loop is endless • For loops provide a simple way of repeating a block –once for each element in a sequence