Strings and Characters

This page provides syntax for strings and characters in Julia as well as some of their associated functions. Each section includes an example to demonstrate the described syntax or function.

Characters and Strings

• Char is a single character

• String is a sequence of one or more characters (index values start at 1)

Some functions that can be performed on strings

Action	Function
get word length	length(word)
extract nth character from word	word[n]
extract substring nth-mth character from word	word[n:m]
search for letter in word	findfirst(isequal(letter), word)
search for subword in word	occursin(word, subword)
remove record separator from word (e.g., n)	chomp(word)
remove last character from word	chop(word)

Use typeof() function to determine type

Input:

# chars_and_strings.jl

letter = 'b'
word = "good-bye"
subword = "good"

word_length = length(word)
word_first_char = word[1]
word_subword = word[6:8]

println("Length of word: $word_length")
println("First character: $word_first_char")
println("Last three characters: $word_subword")

println("$letter is in $word: $(findfirst(isequal(letter), word))")
println("$subword is in $word: $(occursin(subword, word))")
println("chop off the last character: $(chop(word))")

Output:

Length of word: 8
First character: g
Last three characters: bye
b is in good-bye: 6
good is in good-bye: true
chop off the last character: good-by

Resources

• Julia Documentation: Manual - Strings
• Julia Documentation: Base - Strings
• Think Julia: Chapter 8 - Strings