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def summation(n):
        total = 0
        for count in range(1,n + 1):
                total += count
        return total

def main():
        n = int(input('Enter the number of terms : '))
        total = summation(n)
        print('Sum of first', n, 'positive integers:  ' ,total)
if__name__=='__main__':
        main()

Error:
Error(s), warning(s):

  File "source_file.py", line 11
    if__name__=='__main__':
                          ^
SyntaxError: invalid syntax

def summation(n):
    return sum(range(1, n+1))

def main():
    n = int(input('Enter the number of terms : '))
    total = summation(n)
    print(f'Sum of first {n} positive integers: {total}')

if __name__=='__main__':
        main()