Write code to find the second largest number in a list without using built-in functions, and provide a test case for that function.

Question

Accepted Answer

Code to find second largest number in an array without using built-in functions

Iterate through the array to find the largest number
Keep track of the largest number and update it if a larger number is found
Once the largest number is found, iterate again to find the second largest number

Accepted Answer

numbers = [2, 4, 5, 1, 8, 10, 7]
largest = numbers[0]
slargest = -1 # let list contains all positive numbers

for num in numbers[1:]:
    if num > largest:
        slargest, largest = largest, num
    elif slargest < num < largest:
        slargest = num

print(slargest)

Accepted Answer

l = [8,6,9,7]

for i in range(len(l)):

for j in range(i+1,len(l)):

if l[j]>l[i]:

temp = l[i]

l[i]=l[j]

l[j]= temp

print(l[1])

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