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what are break statements in javascript
In JavaScript, a break statement is used to stop the execution of a loop or switch statement. When the break statement is reached, the program will exit the loop or switch and continue with the next line of code after it.
Hereβs a simple example with a loop:
javascript Copy code
for (let i = 0; i < 10; i++) {
if (i === 5) {
break; // Exit the loop when i is 5
}
console.log(i);
}
In this example, the loop prints numbers from 0 to 4. When i becomes 5, the break statement is executed, and the loop ends.
You can learn more about break statements in JavaScript on MDN Web Docs.
how do you write a switch statement in javascript?
A switch statement in JavaScript evaluates an expression and matches it to a corresponding case clause. Here's an example of a switch statement in JavaScript:
javascript Copy code
switch(expression) {
case value1:
// code to be executed if expression matches value1
break;
case value2:
// code to be executed if expression matches value2
break;
default:
// code to be executed if expression doesn't match any value
}
In the example above, expression is the variable or expression to be evaluated. The first case clause, case value1:, is executed if expression is equal to value1. If expression is equal to value2, then the second case clause, case value2:, is executed. If expression does not match any of the case clauses, then the default clause is executed. The break; statement is used to terminate each case clause.
Here's an example usage of a switch statement:
javascript Copy code
let fruits = 'banana';
switch(fruits) {
case 'apple':
console.log('The fruit is apple.');
break;
case 'banana':
console.log('The fruit is banana.');
break;
case 'orange':
console.log('The fruit is orange.');
break;
default:
console.log('The fruit is not apple, banana, or orange.');
}
In the example above, since fruits is equal to 'banana', the second case clause is executed and 'The fruit is banana.' is logged to the console.
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