使用 For 循环在列表中查找最大值

Question

I have a list of scores, and I'd like to find the highest values in the list (in my example below, it is the value 80).

scores = [60,29,60,43,10,9,80,45,23,80,56,4]

highest_score = 0

for i in scores:
    
    if i >= highest_score:
        highest_score = i
        print (highest_score, scores.index(highest_score) )

For highest_scores , it returns [60,60,80,80] , whereas I'd like to get only the highest value 80 . For scores.index(highest_score) , it is giving me the indexes [0,0,6,6] , whereas I'd like to get the indexes of the highest value - that should be [6,6] .

How can I improve my code to get the desired outcome?

Answer 1

If you're looking for the indexes of the highest values in [60,29,60,43,10,9,80,45,23,80,56,4] , I think you mean you want: [6, 9] .

Assuming that you want a "native" implementation of the algorithm without having to resort to the max() function, and that you want the indexes I recommend you use enumerate(scores) :

scores = [60,29,60,43,10,9,80,45,23,80,56,4]

highest_score = scores[0]
indexes = []

for i, s in enumerate(scores):
  if s > highest_score:
    indexes = []
  if s >= highest_score:
    indexes.append(i)
    highest_score = s

print(highest_score, indexes)

Result:

80 [6, 9]

Answer 2

You can find max value by:

max(scores)

Returns 80 .

Answer 3

The mistake you are doing is in the indentation for print statement. It should be outside the loop. Try the below code:

scores = [60, 29, 60, 43, 10, 9, 80, 45, 23, 80, 56, 4]

highest_score = 0

for i in scores:
    if i >= highest_score:
        highest_score = I

# find all indices of the highest_score
indices = [i for i, x in enumerate(scores) if x == highest_score]
print(highest_score, indices)

I have also written a list comprehension for finding all the indices of the highest score in the list, as your code would only return the index of the first occurrence.

Output:

80 [6, 9]

Answer 4

There are better ways to do it, however since you want to do it using for loops, this should work:

scores = [60,29,60,43,10,9,80,45,23,80,56,4]

highest_score = 0
index_list = []

for i in scores:   
   if i >= highest_score:
       highest_score = i

for i in scores:
   if i == highest_score:
       index_list.append(scores.index(i))

print (highest_score , index_list )

Output:

>>> 80 [6, 6]

Answer 5

You can try:

scores = [60,29,60,43,10,9,80,45,23,80,56,4]

highest_score = 0
highest_score_index=[]

for index, score in enumerate(scores):
    if score > highest_score:
        highest_score = score
        highest_score_index.clear()
        highest_score_index.append(index)
    elif score == highest_score:
        highest_score_index.append(index)
        
print (highest_score, highest_score_index )

for single for loop.

Returns: 80 [6, 9]

Answer 6

scores = [60,29,60,43,10,9,80,45,23,80,56,4]
highest_score = None
highest_score_indexes = []

for index, value in enumerate(scores):
    if index == 0:
        highest_score = value
        highest_score_indexes.append(index)
    else:
        if highest_score > value:
            pass
        elif highest_score == value:
            highest_score_indexes.append(index)
        elif highest_score < value:
            highest_score = value
            highest_score_indexes = [index]

print("heighest score {}".format(highest_score))
print("heighest score indexes {}".format(highest_score_indexes`enter code here`))