def builtinfuncs_strings():
    a="122345dsfrf"
    b = len(a)
    print("String a:" + a + ". Lentgh of a is: " + str(b))

    c = "-10"
    d = 15
    e = d + int(c)
    print (e)

    f = "XYZ"
    f = f * 10
    print(f)

    
