![for <control-variable> in <sequence/items in range>:
<statements inside body of the loop>
Eg:-
Program to print even numbers in a given sequence using for loop.
numbers = [1,2,3,4,5,6,7,8,9,10]
for num in numbers:
if (num % 2) == 0:
print(num,'is an even Number')
Output:
2 is an even Number
4 is an even Number
6 is an even Number
8 is an even Number
10 is an even Number
for loop](https://image.slidesharecdn.com/loopspython-230831025047-0ef72745/85/loops-python-pdf-6-320.jpg)
![range()
It is used to create a list containing a
sequence of integers.
from the given start value upto stop
value(excluding stop value), with a
difference of the given step value.
If start value is not specified, by default
the list starts from 0.
If step is also not specified, by default the
value is incremented by 1 in each
iteration.
range([start], stop[, step])](https://image.slidesharecdn.com/loopspython-230831025047-0ef72745/85/loops-python-pdf-7-320.jpg)
![Example
>>> list(range(10))
[0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
#start value is given as 2
>>> list(range(2, 10))
[2, 3, 4, 5, 6, 7, 8, 9]
#step value is 5 and start value is 0
>>> list(range(0, 30, 5))
[0, 5, 10, 15, 20, 25]
#step value is -1. Hence, decreasing sequence is generated
>>> list(range(0, -9, -1))
[0, -1, -2, -3, -4, -5, -6, -7, -8]
Example](https://image.slidesharecdn.com/loopspython-230831025047-0ef72745/85/loops-python-pdf-8-320.jpg)
loops python.pdf
- 1. LOOPS
- 2. Loops / Iteration Sometimes we need to repeat certain things for a particular number of times. For example, a program has to display attendance for every student of a class. Here the program has to execute the print statement for every student. In programming, this kind of repetition is called looping or iteration
- 3. Loops
- 4. Conditional Loops Counting Loops The loop that repeat until certain thing happens eg:-While The loop that repeat certain number of times. eg:-for Types of Loops
- 5. for loop ● The for statement is used to iterate over range of values or a sequence ● The loop executed each item in range, The values can be numeric, string, List or tuple. ● When all the items in the range are exhausted, the statements within loop are not executed and Python interpreter starts executing the statements immediately following the for loop. ● While using for loop, we should know in advance the number of times the loop will execute.
- 6. for <control-variable> in <sequence/items in range>: <statements inside body of the loop> Eg:- Program to print even numbers in a given sequence using for loop. numbers = [1,2,3,4,5,6,7,8,9,10] for num in numbers: if (num % 2) == 0: print(num,'is an even Number') Output: 2 is an even Number 4 is an even Number 6 is an even Number 8 is an even Number 10 is an even Number for loop
- 7. range() It is used to create a list containing a sequence of integers. from the given start value upto stop value(excluding stop value), with a difference of the given step value. If start value is not specified, by default the list starts from 0. If step is also not specified, by default the value is incremented by 1 in each iteration. range([start], stop[, step])
- 8. Example >>> list(range(10)) [0, 1, 2, 3, 4, 5, 6, 7, 8, 9] #start value is given as 2 >>> list(range(2, 10)) [2, 3, 4, 5, 6, 7, 8, 9] #step value is 5 and start value is 0 >>> list(range(0, 30, 5)) [0, 5, 10, 15, 20, 25] #step value is -1. Hence, decreasing sequence is generated >>> list(range(0, -9, -1)) [0, -1, -2, -3, -4, -5, -6, -7, -8] Example
- 9. P #Print multiples of 10 for numbers in a range for num in range(5): if num > 0: print(num * 10) Program 3-5 Program to print the multiples of 10 for numbers in a given range. Output: 10 20 30 40
- 10. A loop may contain another loop inside it. A loop inside another loop is called a nested loop. Nested loop Example Nested Loop
- 11. Let us code..