what is max width in media query code example

Example 1: media query min and max

/* Max-width */
@media only screen and (max-width: 600px)  {...}

/* Min-width */
@media only screen and (min-width: 600px)  {...}

/* Combining media query expressions */
@media only screen and (max-width: 600px) and (min-width: 400px)  {...}

Example 2: min and max width media query

@media (max-width: 989px) and (min-width: 768px) {}

Example 3: media query min max

@media screen and (min-width: 200px) and (max-width: 640px) {
  .bloc {
    display:block;
    clear:both;
  }
}

Example 4: what is a max and min width media query

/* What this query really means, is If [device width] is less than or equal to 600px, then do */
@media only screen and (max-width: 600px)  {...}

/* What this query really means, is If [device width] is greater than or equal to 600px, then do */
@media only screen and (min-width: 600px) {...}