Strings

Question 1

Converting string to number

Answer 1

Str2num(string)

X = double(string)

Question 2

Converting numbers to string

Answer 2

Num2str(value)

X = char(value)

Question 3

How to compare strings correctly
How to compare strings while ignoring case

Comparing string using logical expression ==

Answer 3

Strcmp(s1,s2)
Strcmpi(s1,s2)

Using == compares each character in the string and returns logical value for each character instead of the entire string

Question 4

Difference between fprintf and sprintf

Answer 4

Fprintf prints stuff to the command line

Sprintf puts the stuff into an output argument

Question 5

What is a substring
Function to find a substring / character in a string
What does the function return?
What happens if there are multiple same substrings / characters in the string

Answer 5

Substring = small section of string in an actual string

Strfind(string,substring/char)

Function returns the location of the first occurrence found

Returns the location of first occurrence per substring/character found

Question 6

Replacing characters or substrings in a string

Answer 6

Strrep(string_name,’char/substring to replace’,’char/string to replace with’)