while
while is a JavaScript function in the Statements category. Loops while true. The syntax is while (cond) { }. A typical example: let i=0; while (i<3) { i++ }. A close sibling is if...else, which conditional execution. A close sibling is for, which loop construct. A close sibling is for...of, which iterates over values. A close sibling is switch, which match against cases. More about this category: Statements and declarations. Related Statements methods: if...else, for, for...of, switch, try...catch, throw, const, let. This page is part of the free JS Reference documentation covering 1027+ methods, each with syntax, parameters, return values, examples, and common pitfalls. You can try while immediately in the JavaScript playground, look up unfamiliar terms in the glossary, or return to the JS Reference homepage.