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Lodash _.range() Method - GeeksforGeeks

Last Updated : 20 Oct, 2023

Lodash _.range() method is used to create an array of numbers progressing from the given start value up to, but not including the end value. A step of -1 is used if a negative value of start is specified without an end or step. If the end is not specified, it's set to start with the start and then set to 0.

_.range([start=0], end, [step=1]);

• start: It is a number that specifies the start of the range. It is an optional value. The default value is 0.
• end: It is a number that specifies the end of the range.
• step: It is a number that specifies the amount that the value in the range is incremented or decremented. The default value is 1.

It returns an array with the given range of numbers.

Example 1: In this example, we are printing 5 values in the console as we are passing 5 as an end parameter to the _.range() method.

// Requiring the lodash library  
const _ = require("lodash");            
  
// Using the _.range() method 
let range_arr = _.range(5); 
      
// Printing the output  
console.log(range_arr); 

Output:

[0, 1, 2, 3, 4]

Example 2: In this example, we are passing 0 as a start, 10 as an end and 2 as step and passing these parameter to the _.range() method.

// Requiring the lodash library  
const _ = require("lodash");

// Using the _.range() method
// with the step taken as 2
let range_arr = _.range(0, 10, 2);

// Printing the output  
console.log(range_arr); 

Output:

[0, 2, 4, 6, 8]

Example 3: In this example, we are passing -1 as a start, -11 as an end and -2 as step and passing these parameter to the _.range() method.

// Requiring the lodash library  
const _ = require("lodash");

// Using the _.range() method
// with the step taken as -2
let range_arr = _.range(-1, -11, -2);

// Printing the output  
console.log(range_arr); 

Output:

[-1, -3, -5, -7, -9]

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