Question

I am trying to compile this piece of Python code-

def isPrime ( n ):
    if n < 2 :
        return false
    for x in range(2,n):
        if (n % x)==0:
            return false
    return true

def nthPrime ( n ):
    y = 0
    z = 1
    while y< n:
        z+=1
        if isPrime( z ):
            y+=1
    return z 

But I am having this error in line 9 on “def”

SyntaxError: invalid syntax

Answer 1

Here’s a fixed up version of your code, with proper indenting and using True and False, not true and false:

def isPrime( n ):
    if n < 2 :
        return False
    for x in range(2,n):
        if (n % x)==0:
            return False
    return True

def nthPrime( n ):
    y = 0
    z = 1
    while y < n:
        z+=1
        if isPrime( z ):
            y+=1
    return z

---

And here’s a version of your code that conforms more to the PEP 8 style guide for python:

def isPrime(n):
    if n < 2:
        return False
    for x in range(2, n):
        if (n % x) == 0:
            return False
    return True


def nthPrime(n):
    y = 0
    z = 1
    while y < n:
        z += 1
        if isPrime(z):
            y += 1
    return z

I prefer the second piece of code.