Will I lose belly fat quickly if I only do abdominal exercises?

Belly fat is my biggest concern, so I have been doing abdominal exercises every day recently. I have been consistently doing exercises like crunches, leg raises, and planks, but I am worried because it seems like there isn't much change in my lower belly or love handles.

Some people around me say that doing a lot of abdominal exercises helps you lose belly fat quickly, while others say the opposite—that abdominal exercises only build muscle and that cardio exercise and diet management are more important for losing belly fat—so I am confused about which is right.

I am currently focusing on abdominal exercises, but I am wondering if I absolutely need to include cardio exercises like walking, running, or stationary cycling to lose belly fat. I would also like to know the most effective order for doing strength training and cardio.

Has anyone tried doing only abdominal exercises and not seen results, or has anyone noticed a significant reduction in belly fat after combining cardio with a proper diet? It would be really helpful if you could share the exercises that worked best for you, your workout times, and your diet management methods.