python-f字符串（f-string）99乘法表三种方式

#%s打印99乘法表
for i in range(1,10):
    for j in range(1,i+1):
        print("%s*%s=%s" %(j,i,j*i),end=" ")
    print("\n")

#format打印九九乘法表
for i in range(1,10):
    for j in range(1,i+1):
        print("{0}*{1}={2}".format(j,i,j*i),end=" ")
    print("\n")

#f-string方式
for i in range(1,10):
    for j in range(1,i+1):
        print(f"{j}*{i}={j*i}", end=" ")
    print("\n")