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Generating desired pairs within a range using JavaScript
Problem
We are required to write a JavaScript function that takes in a number n. Our function should generate an array containing the pairs of integers [a, b] that satisfy the following conditions −
0 <= a <= b <= n
Example
Following is the code −
const num = 4; const findPairs = (n = 1) => { const arr = []; for(let i = 0; i <= n; i++){ for(let j = i; j <=n; j++){ let temp = []; temp.push(i, j); arr.push(temp); }; }; return arr; }; console.log(findPairs(num));
Output
[ [ 0, 0 ], [ 0, 1 ], [ 0, 2 ], [ 0, 3 ], [ 0, 4 ], [ 1, 1 ], [ 1, 2 ], [ 1, 3 ], [ 1, 4 ], [ 2, 2 ], [ 2, 3 ], [ 2, 4 ], [ 3, 3 ], [ 3, 4 ], [ 4, 4 ] ]
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