Page 118 - 2611_SmartGPT Pro V(5.0) C-7

FOR LOOP IN PYTHON
Start
The for loop repeats a block of statements a fixed
number of times. It is commonly used to go through
(iterate over) a sequence like a list, a string or a range False
of numbers. It can be specified using a sequence or a Loop condition
range of values. increment/
True decrement
Syntax of the for loop:
Code to be executed
for variable in sequence:

Statement block to be repeated
The for loop variable iterates over the set of values Stop
given in the sequence, repeating the loop body once for
each item. Therefore, the loop header itself defines how many times the loop is going to repeat.
For each iteration, the loop variable takes up the next value from the set and executes the loop
body one more time. The process goes on till the last item of the set has been used.

Program 8. To print each character of a string.
Program8.py Output

File Edit Format Run Options Window Help H
for i in "Hello": e

print(i) l
l
o

Syntax of the for loop with the range():

for variable in range(start, stop, step):
Statement block to be repeated

The for loop initialises the variable with the start value. With each iteration, the variable
changes based on the step value—increment or decrement. This continues until it reaches the
stop value (which is not included). The code inside the loop runs once for each value. This makes
it easy to repeat tasks in a clear and controlled way when you know how many times you want
to repeat them.

Program 9. To print the squares of the first five natural numbers.
Program9.py Output

File Edit Format Run Options Window Help 1
for i in range(1,6): 4
9
print(i*i)
16
25

116 Computer Science (V5.0)-VII