String concatenation in MATLAB - Cheat Sheet & Quick Revision

Recall & Review

beginner

What is string concatenation in MATLAB?

String concatenation is the process of joining two or more strings end-to-end to form a new string.

beginner

How do you concatenate strings using square brackets in MATLAB?<br>

str1 = 'Hello';<br>str2 = 'World';<br>result = ?

Use square brackets to join strings: <br>

result = [str1 ' ' str2]; % result is 'Hello World'

intermediate

What function can you use to concatenate strings in MATLAB besides square brackets?

You can use the strcat function to concatenate strings without adding extra spaces.

intermediate

What is the difference between strcat and using square brackets for concatenation?

strcat removes trailing whitespace from input strings before concatenation, while square brackets keep all characters as is.

beginner

How do you concatenate strings with numbers in MATLAB?

Convert numbers to strings first using num2str, then concatenate. Example:<br>

num = 5;<br>str = ['Value: ' num2str(num)]; % 'Value: 5'

Which of the following concatenates two strings with a space in MATLAB?

A 'Hello' + ' ' + 'World'

B ['Hello' ' ' 'World']

C strcat('Hello', ' ', 'World')

D concat('Hello', 'World')

Using square brackets with a space character joins the strings with a space. strcat removes trailing spaces but does not add spaces automatically.

What does strcat('Hi ', 'there') return?

A 'Hithere'

B 'Hi there'

C 'Hi there'

D Error

strcat removes trailing spaces before concatenation, so 'Hi ' becomes 'Hi', resulting in 'Hithere'.

How do you join the number 10 and string ' apples' into one string?

A ['10' ' apples']

B ['10' + ' apples']

C [num2str(10) ' apples']

D strcat(10, ' apples')

Numbers must be converted to strings with num2str before concatenation.

Which method keeps all spaces exactly as typed when concatenating?

A square brackets []

B strcat

C sprintf

D num2str

Square brackets concatenate strings exactly as they are, including spaces.

What is the output of ['A' 'B' 'C'] in MATLAB?

A Error

B 'A B C'

C ['A', 'B', 'C']

D 'ABC'

Square brackets join characters into one continuous string without spaces.

Explain how to concatenate two strings with a space between them in MATLAB.

Think about how to join strings exactly as you want them to appear.

Describe the difference between using strcat and square brackets for string concatenation.

Consider how spaces are treated in each method.