"""
String operations

concatenate - to combine two or more strings together
concatenation - combining
+ combine
* repeat

"""

str1 = "hello"
str2 = "world"

# expected result :  hello world
str3 = str1 + str2
print(str3)

str3 = str1 + " " + str2
print(str3)

str4 = 'abc'+'123'+'xyz'+'567'
print(str4)


#
str1 = 'abc'
str2 = str1*2
print(str2)

str3 = str1*1
print(str3)

str4 = str1*0
print(f"|{str4}|")

str5 =''
str5 =None

print(str5)









