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First - Arythmetic Progression solution in Clear category for Sum of Integers by freeman_lex
import assert from "assert";
function sumUptoN(N: number): number {
return N * (N + 1) / 2;
}
console.log("Example:");
console.log(sumUptoN(11));
// These "asserts" are used for self-checking
assert.strictEqual(sumUptoN(1), 1);
assert.strictEqual(sumUptoN(2), 3);
assert.strictEqual(sumUptoN(3), 6);
assert.strictEqual(sumUptoN(4), 10);
assert.strictEqual(sumUptoN(5), 15);
assert.strictEqual(sumUptoN(10), 55);
assert.strictEqual(sumUptoN(20), 210);
assert.strictEqual(sumUptoN(100), 5050);
assert.strictEqual(sumUptoN(200), 20100);
assert.strictEqual(sumUptoN(500), 125250);
console.log("Coding complete? Click 'Check Solution' to earn rewards!");
Sept. 23, 2023
