Problem Statement
check if given string is empty
Solution
a string is said to be empty if its length is 0
, or if it equals an empty string. to check if string length is 0
, we can use String.length property and comparison equal-to operator. to check if string equals an empty string, we can use comparison equal value and equal type operator
Program
1. given string is str
. check if string str
is empty using string length
let str = '';
if ( str.length == 0 ) {
console.log('empty string');
} else {
console.log('not an empty string');
}
we have used the condition in if-else statement
2. given number is str
. check if str
is empty using equal-value and equal-type operator
let str = '';
if ( str === '' ) {
console.log('empty string');
} else {
console.log('not an empty string');
}