Introduction:

In Python, Strings are the consecutive collection of characters. A character is plainly a symbol. Strings are enclosed by either single quotation or double quotations. For Example, in Bioinformatics, DNA, RNA or protein are taken in as strings which are the sequences of nucleotides.

Steps:

Assigning to a Variable

• Open the visual studio code.

• Declare a variable and assign a string to it enclosed in single or double quotes.

• Print that variable.

• Go to ‘Debug’ and select ‘Run without debugging’.

• It displays the string you assigned to that variable.

Without Assigning to a Variable

• You can directly write the string in the print(“ ”) function without assigning it to a variable first.

• Go to ‘Debug’ and select ‘Run without debugging’.

• It displays the string you wrote in the parameter of Print function.

Built-in Functions With Strings

• Just like print(“ ”) function, Strings can be used with any of Python’s built-in functions which can be accessed from Python Prompt.

• For that, assign a string to a variable.

• Call this variable with a dot ‘.’ operator proceeding with any built-in function from the Prompt.

• You can assign this statement to a variable and print it or you can call it in print(“ ”) function directly.

• Go to ‘Debug’ and select ‘Run without debugging’.

• It displays the returned string from that function.

Syntax:

variableName = ‘string’

variable.function()

Summary:

In this video, we discussed strings in Python and how we can use them with different Python’s built-in functions such as .upper(), .lower(), .capitalize(), .replace(old, new) and those which can be helpful in Bioinformatics are .startswith(“ ”) and .endswith(“ ”).