Struggling with printing-CodePudding

Below is a program that's meant to calculate a percentage and print a message telling them what grade they received based on what percentage of their score was. problem is every time I run it I get the message: TypeError: can only concatenate str (not "float") to str I'm incredibly new to python and would appreciate any help.

score = input("Please enter your score:")
percentage = float(score) / 50 * 100
print(percentage)

if float(score) <59.99:
    print("you have passed with "   percentage   "%"   " , and received a grade F")
elif float(score) >60 and float(score) <69.99:
    print("you have passed with "   percentage   "%"   " , and received a grade D")
elif float(score) >70 and float(score) <79.99:
    print("you have passed with "   percentage   "%"   " , and received a grade C")
elif float(score) >80 and float(score) <89.99:
    print("you have passed with "   percentage   "%"   " , and received a grade B")
elif float(score) >90 and float(score) <100:
    print("you have passed with "   percentage   "%"   " , and reveived a grade A")
elif float(score) <50:
    print("Score is greater than 50.")

update: thanks for the help it's running perfectly now, code below is for reference

score = input("Please enter your score:")
percentage = float(score) / 50 * 100
print(percentage)

if float(score) < 30:
    print("you have passed with ", percentage, "%", " , and received a grade F")
elif float(score) >=30 and float(score) <35:
    print("you have passed with ", percentage, "%", " , and received a grade D")
elif float(score) >=35 and float(score) <40:
    print("you have passed with ", percentage, "%", " , and received a grade C")
elif float(score) >=40 and float(score) <45:
    print("you have passed with ", percentage, "%", " , and received a grade B")
elif float(score) >=45 and float(score) <=50:
    print("you have passed with ", percentage, "%", " , and reveived a grade A")
elif float(score) >50:
    print("Score is greater than 50.")

CodePudding user response：

Line 15

elif float(score) <50:

score is a string. So you need to do the same thing you did in line 2.

CodePudding user response：

Try this

# Python Program to Calculate Total Marks Percentage and Grade of a Student

print("Enter the marks of five subjects::")

subject_1 = float (input ())
subject_2 = float (input ())
subject_3 = float (input ())
subject_4 = float (input ())
subject_5 = float (input ())

total, average, percentage, grade = None, None, None, None

# It will calculate the Total, Average and Percentage
total = subject_1   subject_2   subject_3   subject_4   subject_5
average = total / 5.0
percentage = (total / 500.0) * 100

if average >= 90:
    grade = 'A'
elif average >= 80 and average < 90:
    grade = 'B'
elif average >= 70 and average < 80:
    grade = 'C'
elif average >= 60 and average < 70:
    grade = 'D'
else:
    grade = 'E'

# It will produce the final output
print ("\nThe Total marks is:   \t", total, "/ 500.00")
print ("\nThe Average marks is: \t", average)
print ("\nThe Percentage is:    \t", percentage, "%")
print ("\nThe Grade is:         \t", grade)