How would you use sprintf to format a floating-point number x so that it shows a plus sign for positive numbers and exactly two decimals?

hard📝 Application Q9 of 15

MATLAB - String Handling

How would you use sprintf to format a floating-point number x so that it shows a plus sign for positive numbers and exactly two decimals?
Example: +3.14, -2.00

Astr = sprintf('%+.2', x);

Bstr = sprintf('%+.2f', x);

Cstr = sprintf('%+2f', x);

Dstr = sprintf('%+.2d', x);

Step-by-Step Solution

Solution:

Step 1: Understand plus sign and decimal formatting
%+ adds sign; .2f formats float with 2 decimals.
Step 2: Check options
str = sprintf('%+.2f', x); correctly combines %+ and .2f; others are invalid or wrong specifiers.
Final Answer:
str = sprintf('%+.2f', x); -> Option B
Quick Check:
Use %+ for sign and .2f for decimals [OK]

Quick Trick: Use %+ to show sign, .2f for two decimals [OK]

Common Mistakes:

Using %+.2d which is integer format
Incorrect order of specifiers
Missing plus sign flag

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How would you use sprintf to format a floating-point number x so that it shows a plus sign for positive numbers and exactly two decimals?

Step 1: Understand plus sign and decimal formatting

Step 2: Check options

Final Answer:

Quick Check:

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