Runtime error - NZEC
Non zero error code (NZEC) is an error that usually occurs in programming contests or online coding platforms. In Python, runtime error – NZEC occurs when a program terminates with a non zero status code. The program returns a status code 0 if it executes successfully. It returns non zero status codes when it fails to execute. This non zero status code is referred to as runtime error - NZEC. Below we can see the flow chart illustrating how this error occurs:
In this Answer, we will see the reasons for runtime error – NZEC and how we can fix them.
Reasons for errors
We can come across runtime error - NZEC in various scenarios. Some common exceptions that can lead to NZEC errors are enlisted below:
ZeroDivisionError: Raised when dividing a number by zero.IndexError: Raised when accessing an index out of range in a sequence.NameError: Raised when trying to access a variable or name that has not been defined.TypeError: Raised when performing unsupported operations between incompatible data types.ValueError: Raised when a function receives an argument of the correct type but an inappropriate value.RecursionError: Raised when a recursive function exceeds the maximum recursion depth.
Below we can see the coding examples showing the errors mentioned above:
ZeroDivisionError
Click the "Run" button to see the ZeroDivisionError:
a = 25b = 0result = a / b # Raises ZeroDivisionError: division by zeroprint(result)
Code explanation
Line 3: We divide
awithb, which raises theZeroDivisionErrorbecausebcontains 0 as its value.
IndexError
Click the "Run" button to see the IndexError:
lst = [1, 2, 3]print(lst[3]) # Raises IndexError: list index out of range
Code explanation
Line 2: We try to access an element at index 3, which raises the
IndexError: list index out of rangeerror.
NameError
Click the "Run" button to see the NameError:
x = 5print(variable) # Raises NameError: name 'variable' is not defined
Code explanation
Line 2: We try to print
variablethat does not exist in our code which raisesNameError: name variable is not definederror.
TypeError
Click the "Run" button to see the TypeError:
num = 5text = "Hello"result = num + text # Raises TypeError: unsupported operand type(s) for +: 'int' and 'str'
Code explanation
Line 3: We try to concatenate two variables containing the string
Helloand the other with integer value 5. Concatenating two different data types is not possible. Therefore, Python raises the`TypeError: unsupported operand types for+: 'int' and 'str'error.
ValueError
Click the "Run" button to see the ValueError:
user_input = "Age"age = int(user_input)
Code explanation
Line 2: We try to convert
user_inputinto an integer data type which is not possible asAgecannot be converted to an integer data type. Ifuser_inputhad a string value of any number like'1','2', or any other number, then the program would execute successfully.
RecursionError
Click the "Run" button to see the RecursionError:
def infinite_recursion(n):if n==1:returnelse:infinite_recursion(n+1)infinite_recursion(2) # Raises RecursionError: maximum recursion depth exceeded
Code explanation
Lines 1–7: We define the
infinite_recursionrecursive function thatreturnifnhas a value of 1. We make a call to function at line 7 withnequal to 2. The function increments the value ofnby 1 because of which, the base case, i.e.,n==1never reaches. This raises theRecursionError: maximum recursion depth exceeded in comparisonerror.
Conclusion
NZEC (non zero exit code) is not a specific error; rather, it is encountered in programming contests and online coding platforms when a program terminates with a non zero exit status code. The exact error message and the specific exception raised depend on the nature of the error in the code.
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