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Introduction

Strings​

Strings in unv are surrounded by either single quotation marks, or double quotation marks.

'hello' is the same as "hello".

You can display a string literal with the print() function:

print("Hello")  
print('Hello')

Assign String to a Variable​

Assigning a string to a variable is done with the variable name followed by an equal sign and the string:

a =  "Hello"  
print(a)

Multiline Strings​

In Unv string can be multiline.

You can use double quotes:

a =  "Lorem ipsum dolor sit amet,  
consectetur adipiscing elit,  
sed do eiusmod tempor incididunt  
ut labore et dolore magna aliqua."
print(a)

Or single quotes:

a =  'Lorem ipsum dolor sit amet,  
consectetur adipiscing elit,  
sed do eiusmod tempor incididunt  
ut labore et dolore magna aliqua.'  
print(a)

Note: in the result, the line breaks are inserted at the same position as in the code.

Strings are Arrays​

Like many other popular programming languages, strings in Unv are arrays of bytes representing unicode characters.

However, currently Unv does not have a character data type, a single character is simply a string with a length of 1.

Square brackets can be used to access elements of the string.

Get the character at position 1 (remember that the first character has the position 0):

a =  "Hello, World!"  
print(a[1])

Looping Through a String​

Since strings are arrays, we can loop through the characters in a string, with a for loop.

Loop through the letters in the word "banana":

for  x  in  "banana"  
    print(x)

String Length​

To get the length of a string, use the length() function from string package.

The length() function returns the length of a string:

import length from "strings"

a =  "Hello, World!"  
print(length(a))

Check String​

To check if a certain phrase or character is present in a string, we can use the keyword in.

Check if "free" is present in the following text:

txt =  "The best things in life are free!"  

print("free"  in  txt)

Use it in an if statement:

Print only if "free" is present:

txt =  "The best things in life are free!"  

if  "free"  in  txt:  
    print("Yes, 'free' is present.")

Check if NOT​

To check if a certain phrase or character is NOT present in a string, we can use the keyword not in.

Check if "expensive" is NOT present in the following text:

txt =  "The best things in life are free!"  
print("expensive"  not  in  txt)

Use it in an if statement:

print only if "expensive" is NOT present:

txt =  "The best things in life are free!"  

if  "expensive"  not  in  txt:  
    print("No, 'expensive' is NOT present.")