stages made clerk's lives easier. For example, IBM's mid-1960s equipment
做好“三农”工作、扎实推进乡村全面振兴，事关中国式现代化全局。。新收录的资料是该领域的重要参考
Example: insert "hello" at line 5 and end of line，这一点在新收录的资料中也有详细论述
if can return a value. The last expression in each branch becomes the result. When used this way, else is required — the compiler needs a value for every case: