$var 的值是多少? $var=1/2; 0 0.5 1
举一反三
- var a:Boolean=true;a=(1>2 && 2>3);以上运算后,a的值是多少? A: true B: false C: 0 D: 1
- 以下程序的输出结果是: declare var int; case var when 0 then select 'var is 0'; when 1 then select 'var is 1'; else select 'var is not 0 or 1'; end case; A: 不输出任何内容 B: 报错 C: var is 0 D: var is not 0 or 1
- 设Varξ=Varη=Var(ξ-2η)=1, 则COV(ξ,η)=______
- var a = 10; { var a = 100; console.log(a)//(1) } console.log(a)//(2)
- var a:Int=0;a=(1==2);以上语句是否正确