Learn for loop (1/5)

Often we don't need to iterate until something happens - we want to iterate over some set of elements, or something like that.

To construct loop iterating over elements use for loop:


              12
            
for var in smth_iterable:
  do_smth

Common practice is using range() as an iterable object we will use in the loop.
range(n) function with 1 positive argument generates a numbers from 0 to n (exclusive, i.e. to n-1).
range(m,n) function generates number from m to n exclusive in case if both are positive and m < n.

For example, we can rewrite the example from section 5.1 using for loop (in that exercise we printed numbers from 1 to 9)


              123
            
# using for loop to print numbers from 1 to 9
for i in range(1,10):
  print(i)

Please note, that unlike while loop, variable i inside for loop shouldn't be defined before. It's like a dummy variable.

Task

Swipe to start coding

Using for loop print all the numbers from 10 to 20 squared.

Solution

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 6. Chapter 3

single

Ask AI

Ask anything or try one of the suggested questions to begin our chat

Often we don't need to iterate until something happens - we want to iterate over some set of elements, or something like that.

To construct loop iterating over elements use for loop:


              12
            
for var in smth_iterable:
  do_smth

For example, we can rewrite the example from section 5.1 using for loop (in that exercise we printed numbers from 1 to 9)


              123
            
# using for loop to print numbers from 1 to 9
for i in range(1,10):
  print(i)

Please note, that unlike while loop, variable i inside for loop shouldn't be defined before. It's like a dummy variable.

Task

Swipe to start coding

Using for loop print all the numbers from 10 to 20 squared.

Solution

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 6. Chapter 3

single

Swipe to show menu

Often we don't need to iterate until something happens - we want to iterate over some set of elements, or something like that.

To construct loop iterating over elements use for loop:


              12
            
for var in smth_iterable:
  do_smth

For example, we can rewrite the example from section 5.1 using for loop (in that exercise we printed numbers from 1 to 9)


              123
            
# using for loop to print numbers from 1 to 9
for i in range(1,10):
  print(i)

Please note, that unlike while loop, variable i inside for loop shouldn't be defined before. It's like a dummy variable.

Task

Swipe to start coding

Using for loop print all the numbers from 10 to 20 squared.

Solution

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

for loop (1/5)

Solution

Awesome!

for loop (1/5)

Solution

Awesome!

for loop (1/5)

Solution