String Concatenation

Joining Strings Together

Concatenation means joining strings end-to-end using the

operator:

first = "Hello"
second = "World"
greeting = first + " " + second
print(greeting)   # → Hello World

Important: the

operator does NOT automatically add spaces. You have to include them yourself — notice the

" "

(a string containing just a space) in the example above.

Concatenation vs print() with commas

These produce the same output but work differently:

print("Hello" + " " + "World")    # Concatenation — you control spaces
print("Hello", "World")            # Commas — Python adds spaces for you

You can't concatenate strings with numbers!

age = 25
print("I am " + str(age) + " years old")  # Must convert with str()
# Or better, use f-strings:
print(f"I am {age} years old")             # Much cleaner!

💡
💡 For complex string building, f-strings (covered in a later lesson) are much cleaner than concatenation. But understanding
+
is still important!