1. Introduction
In Python, pass and continue are two control statements used within loops and conditionals. The pass statement is used as a placeholder for future code, essentially meaning "do nothing." On the other hand, continue is used to skip the current iteration of a loop and move to the next iteration.
2. Key Points
1. Function: pass does nothing and is used as a placeholder, while continue skips the current loop iteration.
2. Usage: pass is used when a statement is required syntactically but no action is needed, continue is used to skip certain iterations of a loop.
3. Flow Control: pass doesn't affect loop execution, continue immediately moves control to the beginning of the loop.
3. Differences
Aspect | Pass | Continue |
---|---|---|
Function | Does nothing, placeholder | Skips to the next loop iteration |
Usage | When a statement is syntactically required | To skip certain loop iterations |
Flow Control | Doesn't affect the execution flow | Immediately moves to the loop's start |
4. Example
# Example of Pass
for i in range(5):
if i == 2:
pass
print(i)
# Example of Continue
for i in range(5):
if i == 2:
continue
print(i)
Output:
Pass Output: 0 1 2 3 4 Continue Output: 0 1 3 4
Explanation:
1. In the pass example, when i equals 2, the pass statement does nothing, and the loop continues normally.
2. In the continue example, when i equals 2, the continue statement causes the loop to skip printing 2 and move to the next iteration.
5. When to use?
- Use pass when you need a placeholder for syntactical reasons or when you plan to write code at that location in the future.
- Use continue when you want to skip the rest of the loop's code for certain iterations, moving the control back to the loop's beginning.
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