[PYTHON] TypeError: can only concatenate str (not "float") to str

Error when executing the following

test.py

NUM=100.00
print("TEST:" + NUM)

$ python test.py
TypeError: can only concatenate str (not "float") to str

Solved by adding str

test.py

NUM=100.00
print("TEST:" + str(NUM))

$ python test.py
TEST:100.00