Check Whether a String Starts and Ends With Certain Characters. JavaScript

#check #JavaScript

Check String Using Built-in Methods

JavaScript

xxxxxxxxxx
 
function checkString(str) {
​
    if(str.startsWith('S') && str.endsWith('G')) {
        console.log('The string starts with S and ends with G');
    }
    else if(str.startsWith('S')) {
        console.log('The string starts with S but does not end with G');
    }
     else if(str.endsWith('G')) {
        console.log('The string starts does not with S but end with G');
    }
    else {
        console.log('The string does not start with S and does not end with G');
    }
}
​
​
let string = prompt('Enter a string: ');
checkString(string);

Output result

Enter a string: String
The string starts with S but does not end with G

Check The String Using Regex

JavaScript

xxxxxxxxxx
 
function checkString(str) {
​
    if( /^S/i.test(str) && /G$/i.test(str)) {
        console.log('The string starts with S and ends with G');
    }
    else if(/^S/i.test(str)) {
        console.log('The string starts with S but does not ends with G');
    }
     else if(/G$/i.test(str)) {
        console.log('The string starts does not with S but ends with G');
    }
    else {
        console.log('The string does not start with S and does not end with G');
    }
}
​
for (let i = 0; i < 3; i++) {
​
    const string = prompt('Enter a string: ');
​
    checkString(string);
}

Output result

Enter a string: String
The string starts with S and ends with G
Enter a string: string
The string starts with S and ends with G
Enter a string: JavaScript
The string does not start with S and does not end with G

JavaScript

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Check Whether a String Starts and Ends With Certain Characters. JavaScript

JavaScript

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