#!/usr/bin/python
# -*- coding:utf-8 -*-

# 函数简介 （python中常用函数）

print abs(100)
print abs(-90)

print cmp(3,4)
print cmp(3,3)
print cmp(3,2)

print int('123')
print int(12.34)

print str(1.23)

a = abs
print a(-20)
