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Python Loops Tutorial
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Python Loops Tutorial

Python Loops Tutorial

1. The for Loop
The first for LoopRange() in a for Loop 1/2Range() in a for Loop 2/2List & for LoopIf/Else in a for LoopBreak/Continue in a for LoopPass, Else in a for LoopEnumerate() in a for LoopChallenge
2. The while Loop
The First while LoopInfinite LoopList & while LoopIf/Else in a while LoopBreak/Continue in a while LoopPass, Else in a while Loop
3. Nested Loops
First Nested Loop PatternNested for LoopNested while LoopWhile Loop inside a for LoopIf/Else in a Nested LoopBreak/Continue in a Nested LoopChallenge

Enumerate() in a for Loop

The enumerate() function proves valuable when we need to access both the value and its index within any sequence, such as a list or string.

For instance, a list serves as an ordered data structure that associates each item with a unique index number. Utilizing this index number, we can conveniently access or alter the corresponding value.

The syntax for using enumerate() is: for index, value in enumerate(___)

Note

As a quick reminder: index refers to the position of an element. In Python, we begin counting indexes from 0.

Examine the following code:


              
12345

            
numbers = [2, 3, 8, 5, 6, 7, 8, 11, 8]

# Printing all elements of the list with their indexes
for i, v in enumerate(numbers):
  print('Numbers[', i, '] =', v)
copy

How does the code work?

Tarea

Count the quantity of numbers in the list that are multiples of three.

  1. Configure the for loop with enumerate() to operate on numbers, employing i for indexes and v for values.
  2. Establish the condition that checks whether a number is a multiple of three.
  3. Increment the counter by 1 if the number meets the condition.
  4. Display the value of the counter.

Tarea

Count the quantity of numbers in the list that are multiples of three.

  1. Configure the for loop with enumerate() to operate on numbers, employing i for indexes and v for values.
  2. Establish the condition that checks whether a number is a multiple of three.
  3. Increment the counter by 1 if the number meets the condition.
  4. Display the value of the counter.

Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones

¿Todo estuvo claro?

Sección 1. Capítulo 8
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Enumerate() in a for Loop

The enumerate() function proves valuable when we need to access both the value and its index within any sequence, such as a list or string.

For instance, a list serves as an ordered data structure that associates each item with a unique index number. Utilizing this index number, we can conveniently access or alter the corresponding value.

The syntax for using enumerate() is: for index, value in enumerate(___)

Note

As a quick reminder: index refers to the position of an element. In Python, we begin counting indexes from 0.

Examine the following code:


              
12345

            
numbers = [2, 3, 8, 5, 6, 7, 8, 11, 8]

# Printing all elements of the list with their indexes
for i, v in enumerate(numbers):
  print('Numbers[', i, '] =', v)
copy

How does the code work?

Tarea

Count the quantity of numbers in the list that are multiples of three.

  1. Configure the for loop with enumerate() to operate on numbers, employing i for indexes and v for values.
  2. Establish the condition that checks whether a number is a multiple of three.
  3. Increment the counter by 1 if the number meets the condition.
  4. Display the value of the counter.

Tarea

Count the quantity of numbers in the list that are multiples of three.

  1. Configure the for loop with enumerate() to operate on numbers, employing i for indexes and v for values.
  2. Establish the condition that checks whether a number is a multiple of three.
  3. Increment the counter by 1 if the number meets the condition.
  4. Display the value of the counter.

Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones

¿Todo estuvo claro?

Sección 1. Capítulo 8
toggle bottom row

Enumerate() in a for Loop

The enumerate() function proves valuable when we need to access both the value and its index within any sequence, such as a list or string.

For instance, a list serves as an ordered data structure that associates each item with a unique index number. Utilizing this index number, we can conveniently access or alter the corresponding value.

The syntax for using enumerate() is: for index, value in enumerate(___)

Note

As a quick reminder: index refers to the position of an element. In Python, we begin counting indexes from 0.

Examine the following code:


              
12345

            
numbers = [2, 3, 8, 5, 6, 7, 8, 11, 8]

# Printing all elements of the list with their indexes
for i, v in enumerate(numbers):
  print('Numbers[', i, '] =', v)
copy

How does the code work?

Tarea

Count the quantity of numbers in the list that are multiples of three.

  1. Configure the for loop with enumerate() to operate on numbers, employing i for indexes and v for values.
  2. Establish the condition that checks whether a number is a multiple of three.
  3. Increment the counter by 1 if the number meets the condition.
  4. Display the value of the counter.

Tarea

Count the quantity of numbers in the list that are multiples of three.

  1. Configure the for loop with enumerate() to operate on numbers, employing i for indexes and v for values.
  2. Establish the condition that checks whether a number is a multiple of three.
  3. Increment the counter by 1 if the number meets the condition.
  4. Display the value of the counter.

Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones

¿Todo estuvo claro?

The enumerate() function proves valuable when we need to access both the value and its index within any sequence, such as a list or string.

For instance, a list serves as an ordered data structure that associates each item with a unique index number. Utilizing this index number, we can conveniently access or alter the corresponding value.

The syntax for using enumerate() is: for index, value in enumerate(___)

Note

As a quick reminder: index refers to the position of an element. In Python, we begin counting indexes from 0.

Examine the following code:


              
12345

            
numbers = [2, 3, 8, 5, 6, 7, 8, 11, 8]

# Printing all elements of the list with their indexes
for i, v in enumerate(numbers):
  print('Numbers[', i, '] =', v)
copy

How does the code work?

Tarea

Count the quantity of numbers in the list that are multiples of three.

  1. Configure the for loop with enumerate() to operate on numbers, employing i for indexes and v for values.
  2. Establish the condition that checks whether a number is a multiple of three.
  3. Increment the counter by 1 if the number meets the condition.
  4. Display the value of the counter.

Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones
Sección 1. Capítulo 8
Cambia al escritorio para practicar en el mundo realContinúe desde donde se encuentra utilizando una de las siguientes opciones
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