?Describe the structure of theif elsestatement.

What will be an ideal response?

?Theifstatement runs a command or a command block only if the conditional expression returns the valuetrue; it does nothing if the condition is false. On some occasions, a user might want to choose between alternate command blocks so that one command block is run if the conditional expression is true, and a different command block is run if the expression is false. The general structure of anifelse statement follows:?if (condition) {commands if condition is true} else {commands if condition is false}?If only a single command is run in response to theifstatement, one can use the following abbreviated form:
if (condition) command if condition is trueelse command if condition is false;?The following example shows anifelse statement that displays two possible alert boxes depending on whether the value of the day variable is Friday or not:
if (day === "Friday") alert("Thank goodness it's Friday")else alert("Today is " + day);?Likeifstatements,ifelsestatements can be nested as in the following code, which chooses between three possible alert boxes:
if (day === "Friday") alert("Thank goodness it's Friday")else {if (day === "Monday") alert("Blue Monday")else alert("Today is " + day);}?Some programmers advocate always using curly braces even if the command block contains only a single command. This practice visually separates oneelseclause from another. Also, when reading through nested statements, it can be helpful to remember that anelseclause usually pairs with the nearest precedingifstatement.