[Solved] What is wrong with this MATLAB code?fid = fopen('data.txt', 'w');fprintf(fid, 'Number: %f\n', 3.14); | MATLAB

MATLAB - File I/O

What is wrong with this MATLAB code?

fid = fopen('data.txt', 'w');
fprintf(fid, 'Number: %f\n', 3.14);

Afprintf format specifier %f is invalid

BFile is not closed after writing

Cfopen mode 'w' is incorrect

Dfprintf cannot write floats

Step-by-Step Solution

Solution:

Step 1: Check file opening and writing
File opened in write mode and fprintf writes float correctly.
Step 2: Check file closing
File is not closed with fclose, which can cause data loss or locking.
Final Answer:
File is not closed after writing -> Option B
Quick Check:
Always fclose files after writing [OK]

Quick Trick: Always fclose after fopen to save data [OK]

Common Mistakes:

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