Converting between types in MATLAB - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to convert the number 5 to a string.

MATLAB

str_num = [1](5);

Drag options to blanks, or click blank then click option'

Anum2str

Bint2str

Cstring

Dchar

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'char' which converts numbers to characters but not strings.

Using 'string' which is for string arrays, not simple conversion here.

The num2str function converts numbers to strings in MATLAB.

2fill in blank

medium

Complete the code to convert the string '123' to a number.

MATLAB

num_val = [1]('123');

Drag options to blanks, or click blank then click option'

Astring

Bnum2str

Cstr2num

Dint2str

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'num2str' which converts numbers to strings, not the other way.

Using 'string' which converts to string arrays.

The str2num function converts strings to numbers in MATLAB.

3fill in blank

hard

Fix the error in converting the number 65 to a character.

MATLAB

char_val = [1](65);

Drag options to blanks, or click blank then click option'

Aint2str

Bnum2str

Cstring

Dchar

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'num2str' which converts numbers to strings, not characters.

Using 'string' which creates string arrays.

The char function converts numeric ASCII codes to characters in MATLAB.

4fill in blank

hard

Fill both blanks to convert the string '45' to a double and then back to a string.

MATLAB

num_val = [1]('45');
str_val = [2](num_val);

Drag options to blanks, or click blank then click option'

Astr2double

Bnum2str

Cstr2num

Dchar

Attempts:

3 left

💡 Hint

Common Mistakes

Using str2num instead of str2double which is more precise.

Using char which is for characters, not numbers.

str2double converts a string to a double number, and num2str converts a number back to a string.

5fill in blank

hard

Fill all three blanks to convert the number 50 to a character, then to a string, and finally back to a number.

MATLAB

char_val = [1](50);
str_val = [2](char_val);
num_val = [3](str_val);

Drag options to blanks, or click blank then click option'

Achar

Bstring

Cstr2double

Dnum2str

Attempts:

3 left

💡 Hint

Common Mistakes

Using num2str instead of string for character to string conversion.

Using str2num instead of str2double for string to number conversion.

First, char converts number to character. Then string converts character to string. Finally, str2double converts string back to number.