A “string” is a text that could be just one letter, a group of letters (characters), a phrase, sentence, or a paragraph.
Defining a string
Example code:
1. string1 = 'Welcome!'
2. print(string1)Output:
Welcome!Line 1: A string can be defined using a variable. The variable is string1 and the ‘=’ sign means we are assigning it to ‘Welcome’
Note that we use quotation marks around the word or sentence. We can use single or double quotes
Anything that is typed inside the set of quotation marks would be displayed including numerals, spaces and punctuation marks!
Line 2: Would display string1 in the output screen
Example code:
Joining strings: Concatenation
Joining two strings is called concatenation. Strings are joined using the ‘+ ’ sign. Putting the ‘+’ between the strings lets Python know that you are joining them.
Joining two string variables:
Example code:
Line 4: aString and bString are joined using the ‘+’ operator and assigned to newString variable.
Line 5: prints newString. Notice that there is no space between the strings. A space can be added inside the quotes if needed.
Strings can also be joined in the print statement using a comma.This adds a space between the variables
Example code:
Joining a string literal to string variables:
Example code:
Joining a string to a number:
A number can be joined to the string using the ‘str()’ function. This converts the number to a string. If this is not done, an error will be thrown, as Python would think you are mathematically adding a text to a number
Example code:
Line 3: Joining without ‘str()’ before aNumber will throw one of the above errors.
Line 3: Joining with str followed by a number in parenthesis removes the error.
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