Python - How To If a goto Statement Exists in Python

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This article provides you with the answer if the goto statement exists or not in Python.

Basically, goto statements are not supported in Python. Generally, these statements are widely despised because they result in very unorganized code; thus, ending up in spaghetti code. Such code becomes hard to understand and trace back while trying to understand flows and debugging.

Python enables structured programming by using several ways to branch code, such as using if-else expressions, exceptions, and loops.

If you want to emulate a goto statement in Python, this article provides some examples. However, these methods are not recommended as it is a bad programming practice to use goto.

Use Exceptions to Emulate a goto Statement in Python

You could use exceptions to provide a structured way of implementing goto, even though it is not a recommended programming practice. After all, exceptions can jump out of deeply nested control structures. Check this example below.

class gotolabel(Exception): print("from the goto label")  # declare a label  try:     x=4     if (x>0): raise gotolabel()  # goto the label named "gotolabel" except gotolabel:  # where to goto the label named "gotolabel"     pass 

Output:

from the goto label 

Use Loops With break and continue Statements to Emulate a goto Statement in Python

You could use loops with break, and continue statements to emulate a goto statement in Python. This example program demonstrates this method.

prompt = "Roll the dice "  while True:     try:         y = int(input(prompt))     except ValueError:         print ("Please enter a valid number")         continue      if y > 6:         prompt = "The dice has numbers 1-6 ! Input a number <6"     elif y < 1:         prompt = "The dice has numbers 1-6 ! Input a number >1"     else:         print("Correct!")         break 

Output:

Roll the dice hj Please enter a valid number Roll the dice 6 Correct! 

Here, the continue statement helps the process jump to the next iteration of the loop and cause an infinite loop. On the other hand, the break statement helps terminate the loop.