payment( ) 函数示例

store 100000 to gnprincipal	  && $100,000 的开始本金
store .105/12 to gninterest  && 10.5% 的年利率
store (20*12) to gnpayments	  && 20 年按月偿还
clear
? payment(gnprincipal, gninterest, gnpayments)  && 显示 998.38