Step 1: Picture the spring as coils.
A spring is just a wire wound into many loops sitting next to each other. When current flows, every loop carries current in the same circular sense.
Step 2: Recall how parallel currents behave.
Two wires carrying current in the same direction pull toward each other. This is a basic rule of the magnetic force between currents.
Step 3: Apply it to neighbouring turns.
Each turn of the spring is parallel to the next, and they carry current the same way.
Step 4: Find the force between turns.
Since the currents in side by side turns run the same way, the turns attract one another.
Step 5: See the effect on the spring.
The turns being pulled together means the gaps between them shrink.
Step 6: State the result.
The spring gets shorter, so it compresses. \[ \boxed{\text{Spring gets compressed}} \]