button{
/*Change the width as much as you like, but make sure
margin-left and margin-right + width = 100%*/
width:50%;
margin-left:25%;
margin-right:25%;
}/* in HTML, the buttons id is example*/
#example{
text-align: center;
}
/* If that doesn't work, put a div and center the div*/
#example2{
text-align: center;
}text-align:'center'text-align: center - By setting the value of text-align property of parent div tag to the center.
margin: auto - By setting the value of margin property to auto.
display: flex - By setting the value of display property to flex and the value of justify-content property to center.
display: grid - By setting the value of display property to the grid.