I want one instruction to run at once only in this expected manner but not happening.

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a=index of i in arr;



when arr[0]=='moveRight' and arr[1]=='moveLeft' it looks like the image moves diagonally but I want only one to work at once. What should I do here now?

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your looking for a switch or elseif, the code is allowing both moveRight and moveLeft to be triggered, if you wrote it like this you will be good.

switch (a) {
    case 'moveRight':
    case 'moveLeft':
    case 'moveUp':
    case 'moveDown':


if (a == 'moveRight') {
} else if (a == 'moveLeft') {
} else if (a == 'moveUp') {
} else if (a == 'moveDown') {


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