js get first 3 characters of string
const string = "0123456789";
console.log(string.slice(0, 2)); // "01"
console.log(string.slice(0, 8)); // "01234567"
console.log(string.slice(3, 7)); // "3456"js get first 3 characters of string
const string = "0123456789";
console.log(string.slice(0, 2)); // "01"
console.log(string.slice(0, 8)); // "01234567"
console.log(string.slice(3, 7)); // "3456"substr() javascript
const str = 'substr';
console.log(str.substr(1, 2)); // (1, 2): ub
console.log(str.substr(1)); // (1): ubstr
/* Percorrendo de trás para frente */
console.log(str.substr(-3, 2)); // (-3, 2): st
console.log(str.substr(-3)); // (-3): strsubstring in javascript
let str = "abcdefghi"
// index-> 012456789
// str.slice(±start, ±end)
console.log(str.slice(2, 5)) // cde
console.log(str.slice(-5, -3)) // ef
// str.subString(+start, +end) // can't take -ve index
console.log(str.substring(2, 5)) // cde
console.log(str.substring(5, 2)) // cde
// str.substr(±start, length)
console.log(str.substr(2, 5)) // cdefgjs substr
//str.substr(start[, length])
var str = 'abcdefghij';
console.log('(1, 2): ' + str.substr(1, 2)); // '(1, 2): bc'
console.log('(-3, 2): ' + str.substr(-3, 2)); // '(-3, 2): hi'
console.log('(-3): ' + str.substr(-3)); // '(-3): hij'
console.log('(1): ' + str.substr(1)); // '(1): bcdefghij'
console.log('(-20, 2): ' + str.substr(-20, 2)); // '(-20, 2): ab'
console.log('(20, 2): ' + str.substr(20, 2)); // '(20, 2): 'Copyright © 2021 Codeinu
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