Subcanding en JavaScript utilizando subcadena

const str = "Learning to code";

// substring between index 2 and index 5
console.log(str.substring(2, 5));
// substring between index 0 and index 4
console.log(str.substring(0, 4));

// using substring() method without endIndex
console.log(str.substring(2));
console.log(str.substring(5));
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