11. [Python] print 기본 사용

a = 10
b = 11

print("test")
print("test" + "test2")

print("a1=" + str(a))

str_a = "a2=" + str(a)
print(str_a)

print(f"a3={a}")

print("a4={}".format(a))
print("a5={0},{1}".format(a, b))