C: Mixing Loops and Conditionals in Python

By Waqas Hussain (GlitchWH) Computer System Engineering student specializing in Python and Cyber Security

Introduction

Real programs combine repetition and decisions. A loop repeats work, and a conditional decides what to do on each repetition. Mixing the two is how you filter, search, count, and validate data.

Step 1: A Conditional Inside a Loop

This is the most common pattern. The loop supplies each item, and the if decides what to do with it. The condition is re-evaluated on every iteration with the new value.

Step 2: A Loop Inside a Conditional

The condition is checked once, and the loop runs only if it passes.
First, we tell Python that the user is logged in.

• Python remembers this using a value that means “Yes.”

• Next, Python checks whether the user is logged in.

• Since the answer is yes, Python continues.

• It then starts a loop to repeat an action.

• The loop begins with the number 1.

• Python displays “Item 1” on the screen.

• Then the loop moves to the number 2.

• Python displays “Item 2” on the screen.

• After displaying both items, the loop finishes.

Step 3: Counting With a Condition

Combine a counter with an if to count only matching items:

Step 4: continue Skips an Iteration

so what happens here, first we set a loop which is "for" loop obivously. we set loop from 1 to 5, where as the 6 is excluded, in line 21| there is a condition says skip the number 3 and continue running the loop.

so it runs and prints the numbers as 1 2 4 5 respectively.

Step 5: break Stops the Loop

i will leave the output of this upto you learners.

Conclusion

Loops repeat work and conditionals decide what to do. Put an if inside a loop to filter or react to each item, put a loop inside an if to run repetition only when allowed, and use continue, break, and loop else to control the flow. Counters and flags must be created before the loop.