本练习中的空字符串连接

时间:2015-12-12 12:58:58

标签: javascript

我们有练习

确定并打印99元素浮点数组w中包含的最小值和最大值。

解决方案是:

var highestNumber = w[ 0 ];
var lowestNumber = w[ 0 ];

for ( var i = 1; i < 99; i++ )
{
    if ( w[ i ] > highestNumber )
        highestNumber = w[ i ];
    if ( w[ i ] < lowestNumber )
        lowestNumber = w[ i ];
}
document.writeln( highestNumber + " " + lowestNumber );

此处字符串连接" "的目的是什么?

2 个答案:

答案 0 :(得分:1)

" "在字符串中创建一个空格,所以它看起来像这样:

document.writeln( X + " " + Y );

X Y 

而不是

document.writeln( X + Y );

XY

答案 1 :(得分:0)

" "会在给定的最高值和最低值之间提供空格。与此99 85相同,否则会显示为9985

highestNumber = 99;

lowestNumber = 85;

示例:

document.writeln( highestNumber + " " + lowestNumber );

OutPut:

99 85