how do you make the text bold in css code example

Example 1: css text bold

font-weight: bold;

Example 2: css bold text

we can set text bold using css property named 'font-weight'
Syntax:
selector{
  font-weight: bold;
}

Example 3: css bold weight

/* key word "lighter", "normal", "bold", or "bolder" */ 
.normal {
  font-weight: normal;
}

/* number between 100 and 900 */
.heavy {
  font-weight: 900;
}