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Anthonyx82
Asked: 2022-10-18 23:25:34 +0800 CST 2022-10-18 23:25:34 +0800 CST

Can someone give me a little explanation of this code?

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I have the following python code in which I have to get the largest number from the list without using the max function I have taken the code from the internet but it lacks an explanation so I would like someone to explain it to me

lista = [3, 7, 23, -2, 0, 6]
#Declaramos la variable max que sea igual a 0
max = lista[0]
#No se que hace este bucle exactamente
for lista in lista:
    if lista > max:
        max = lista
print("El máximo es " + str(max))
python

1 Answers

  1. Best Answer
    max = lista[0]

    Assigns the value at index 0 of the array to the variable max, that ismax = 3

    for elemento in lista:
    if elemento > max:
        max = elemento

    Iterates and checks if the element is greater than the current element, if so it sets the variable equal.

    visual example

    first iteration

    for elemento in lista: # Elemento vale el primer valor de tu lista, es decir 3
    if elemento > max: # elemento = 3, max = 3, entonces 3 > 3? NO.
        max = elemento # No entra.

    second iteration

    for elemento in lista: # Elemento vale el segundo valor de tu lista, es decir 7
    if elemento > max: # elemento = 7, max = 7, entonces 7 > 3? SÍ.
        max = elemento # Entra y reasigna, ahora max vale lo que vale elemento (7)

    third iteration

    for elemento in lista: # Elemento vale el tercer valor de tu lista, es decir 23
    if elemento > max: # elemento = 23, max = 7, entonces 23 > 7? SÍ.
        max = elemento # Entra y reasigna, ahora max vale lo que vale elemento (23)

    fourth iteration

    for elemento in lista: # Elemento vale el cuarto valor de tu lista, es decir -2
    if elemento > max: # elemento = -2, max = 23, entonces -2 > 23? NO.
        max = elemento # No entra.

    fifth iteration

    for elemento in lista: # Elemento vale el quinto valor de tu lista, es decir 0
    if elemento > max: # elemento = 0, max = 23, entonces 0 > 23? NO.
        max = elemento # No entra.

    sixth iteration

    for elemento in lista: # Elemento vale el cuarto valor de tu lista, es decir 6
    if elemento > max: # elemento = 6, max = 23, entonces 6 > 23? NO.
        max = elemento # No entra.

    There are no more iterations, it leaves the forand maxis still valid23

    GRADES:

    max = lista[0]does not assign max = 0as the comment says, but to index 0 of your list

    Although the code works well, do not use the same name of the variable in the for, that is, if you listcall it listain the for, do not do this for lista in listasince it is confusing and can cause problems when using it again, listathat is why in the example i changed the name toelemento

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