请阅读以下程序,选择jiecheng正确的值:var m = 5 , jiecheng = 1 ;for( var i = 1 ; i <= 5 ; i++){ jiecheng *= i ;}
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执行完以下语句,a 的值是( )。function suma( i ){var sums = 0 ;for(var n = 0 ; n <= i ; n++){ sums += n ;}return suma;}var a = sum(6);
A. 6
B. 15
C. 21
D. 20
执行完以下语句,a的值是()。var numbers = [ 34 , 56 , 78 , 19 ];var a = 0 ;for(var i = 0 ; i < 4 ; i ++){ a += numbers[i] ;}
A. 187
B. 159
C. 34
D. 79
执行完以下语句,stra 的值是( )。var chars = ['This ','is ','a ','dog.'] ;var stra = '' ;for(string chara in chars){ stra += chara ;}
A. Thisisadog.
B. This is a dog .
C. This is a dog.
D. This is a.
以下表达式能够取到0-10之间的随机整数的是()。
A. Math.floor(Math.random()*10);
B. Math.round(Math.random()*10);
C. Math.ceil(Math.random()*10);
D. Math.static(Math.random()*10);