檢視单位阶跃函数的原始碼

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|<center>'''单位阶跃函数'''<br><img
src=" https://ss1.baidu.com/-4o3dSag_xI4khGko9WTAnF6hhy/baike/s=220/sign=157d15a9277f9e2f74351a0a2f31e962/0b46f21fbe096b6342d2f91f0c338744eaf8acb2.jpg" width="280"></center><small>  圖片來自百度</small> 
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单位阶跃函数又称单位布阶函数目前有三种定义，共同之处是[[自变量]]取值大于0时，[[函数值]]为1；自变量取值小于0时，函数值为0，不同之处是，自变量为0时函数值各不相同。