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Python Loops Tutorial

If/Else in a while Loop

We previously used the if/else structure in conjunction with for loops, and we can apply the same concept to while loops.

An if/else structure within a while loop functions when the while condition becomes False.

Examine the code below:


              1234567891011
            
numbers = [1, 2, 4, 5, 7]
i = 0

# Checking even and odd
while i < len(numbers):
  if numbers[i] % 2 == 0:
    print(numbers[i], 'is an even number')
    i += 1
  else:
    print(numbers[i], 'is an odd number')
    i += 1

How does the code work?

Tarefa

Multiply all the negative numbers in the list.

Initialize a while loop, utilizing i to interact with numbers.
Establish the condition if an element is less than 0.
Multiply the element and accumulate it in the counter.
Update the value of i to change the list index.
Display the value stored in the counter.

Tarefa

Multiply all the negative numbers in the list.

Initialize a while loop, utilizing i to interact with numbers.
Establish the condition if an element is less than 0.
Multiply the element and accumulate it in the counter.
Update the value of i to change the list index.
Display the value stored in the counter.

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Tudo estava claro?

Seção 2. Capítulo 4

If/Else in a while Loop

We previously used the if/else structure in conjunction with for loops, and we can apply the same concept to while loops.

An if/else structure within a while loop functions when the while condition becomes False.

Examine the code below:


              1234567891011
            
numbers = [1, 2, 4, 5, 7]
i = 0

# Checking even and odd
while i < len(numbers):
  if numbers[i] % 2 == 0:
    print(numbers[i], 'is an even number')
    i += 1
  else:
    print(numbers[i], 'is an odd number')
    i += 1

How does the code work?

Tarefa

Multiply all the negative numbers in the list.

Initialize a while loop, utilizing i to interact with numbers.
Establish the condition if an element is less than 0.
Multiply the element and accumulate it in the counter.
Update the value of i to change the list index.
Display the value stored in the counter.

Tarefa

Multiply all the negative numbers in the list.

Initialize a while loop, utilizing i to interact with numbers.
Establish the condition if an element is less than 0.
Multiply the element and accumulate it in the counter.
Update the value of i to change the list index.
Display the value stored in the counter.

Mude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixo

Tudo estava claro?

Seção 2. Capítulo 4

If/Else in a while Loop

We previously used the if/else structure in conjunction with for loops, and we can apply the same concept to while loops.

An if/else structure within a while loop functions when the while condition becomes False.

Examine the code below:


              1234567891011
            
numbers = [1, 2, 4, 5, 7]
i = 0

# Checking even and odd
while i < len(numbers):
  if numbers[i] % 2 == 0:
    print(numbers[i], 'is an even number')
    i += 1
  else:
    print(numbers[i], 'is an odd number')
    i += 1

How does the code work?

Tarefa

Multiply all the negative numbers in the list.

Initialize a while loop, utilizing i to interact with numbers.
Establish the condition if an element is less than 0.
Multiply the element and accumulate it in the counter.
Update the value of i to change the list index.
Display the value stored in the counter.

Tarefa

Multiply all the negative numbers in the list.

Initialize a while loop, utilizing i to interact with numbers.
Establish the condition if an element is less than 0.
Multiply the element and accumulate it in the counter.
Update the value of i to change the list index.
Display the value stored in the counter.

Mude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixo

Tudo estava claro?

We previously used the if/else structure in conjunction with for loops, and we can apply the same concept to while loops.

An if/else structure within a while loop functions when the while condition becomes False.

Examine the code below:


              1234567891011
            
numbers = [1, 2, 4, 5, 7]
i = 0

# Checking even and odd
while i < len(numbers):
  if numbers[i] % 2 == 0:
    print(numbers[i], 'is an even number')
    i += 1
  else:
    print(numbers[i], 'is an odd number')
    i += 1

How does the code work?

Tarefa

Multiply all the negative numbers in the list.

Initialize a while loop, utilizing i to interact with numbers.
Establish the condition if an element is less than 0.
Multiply the element and accumulate it in the counter.
Update the value of i to change the list index.
Display the value stored in the counter.

Mude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixo

Seção 2. Capítulo 4

Mude para o desktop para praticar no mundo realContinue de onde você está usando uma das opções abaixo