Javascript 如何将if语句放入for循环中？

当我处于循环的最后一个编号时，我想更改

volgendecylinder

的值

我尝试了以下代码，但似乎不起作用：

for (i = 1; i < aantalDwars; i++) { 

    var geometry2 = new THREE.CylinderGeometry( dwarsDiameter * scale , dwarsDiameter * scale , lengte2*scale , 20 );
    var material2 = new THREE.MeshBasicMaterial( {color: 0xe4734f} );
    var cylinder2 = new THREE.Mesh( geometry2, material2 );
    cylinder2.userData.type = 'cylinder';

    scene.add( cylinder2 );
    if (i = aantalDwars){
        volgendeCylinder = ((lengte*scale)/2) + uitsteekLinks
    }

    cylinder2.position.set( ((lengte*scale)/2)+volgendeCylinder2, 1 , 0);
    volgendeCylinder2 -= (dwarsMaas*scale);
    cylinder2.rotation.x = Math.PI / 2;
}

for（i=1；i

用于（i=1；i

=

是赋值，而不是比较在javascript中什么是比较？==？此外，循环取决于i=将检查两个项目是否大致相同（

“1”==1=>true

），

==

将检查两个变量是否相同，谢谢nick！是的，当我重新阅读时，我也意识到了这一点。请添加一些文字来解释你刚才做了什么。如果（I==aantalDwars-1）在这个谎言中只做了更改，那么if语句只会被更改。请释放标志输入错误问题，以便结束-它们显然与堆栈溢出无关。回答是不恰当的

for (i = 1; i < aantalDwars; i++) { 

    var geometry2 = new THREE.CylinderGeometry( dwarsDiameter * scale , dwarsDiameter * scale , lengte2*scale , 20 );
    var material2 = new THREE.MeshBasicMaterial( {color: 0xe4734f} );
    var cylinder2 = new THREE.Mesh( geometry2, material2 );
    cylinder2.userData.type = 'cylinder';

    scene.add( cylinder2 );
    if (i == aantalDwars-1){
    volgendeCylinder = ((lengte*scale)/2) + uitsteekLinks

    }

    cylinder2.position.set( ((lengte*scale)/2)+volgendeCylinder2, 1 , 0);
    volgendeCylinder2 -= (dwarsMaas*scale);
    cylinder2.rotation.x = Math.PI / 2;
}