fix: remove step form inc & dec functions

Author: erfan-goodarzi

docs/pages/number/dec.mdx

@@ -1,6 +1,6 @@
 # dec
 
-Decrements the given number by 1, or by a specified step. Useful for counters and mathematical operations.
+Decrements the given number by 1. Useful for counters and mathematical operations.
 
 ### Import
 
@@ -11,12 +11,12 @@ import { dec } from '@fullstacksjs/toolbox';
 ### Signature
 
 ```typescript copy
-function dec(n: number, step?: number): number {}
+function dec(n: number): number {}
 ```
 
 ### Examples
 
 ```typescript copy
-dec(3)       // 2
-dec(3, 2)    // 1
+dec(3) // 2
+dec(5) // 4
 ```

docs/pages/number/inc.mdx

@@ -1,6 +1,6 @@
 # inc
 
-Increments the given number by 1, or by a specified step. Useful for counters and mathematical operations.
+Increments the given number by 1. Useful for counters and mathematical operations.
 
 ### Import
 
@@ -11,12 +11,12 @@ import { inc } from '@fullstacksjs/toolbox';
 ### Signature
 
 ```typescript copy
-function inc(n: number, step?: number): number {}
+function inc(n: number): number {}
 ```
 
 ### Examples
 
 ```typescript copy
-inc(3)       // 4
-inc(3, 2)    // 5
+inc(3) // 4
+inc(5) // 6
 ```

src/number/dec.spec.ts

@@ -0,0 +1,8 @@
+import { dec } from './dec';
+
+describe('dec', () => {
+  it('should decrement by 1', () => {
+    expect(dec(2)).toBe(1);
+    expect(dec(5)).toBe(4);
+  });
+});

src/number/dec.ts

@@ -1,14 +1,14 @@
 /**
- * Decrements a number by 1 or a specified step.
+ * Decrements a number by 1.
  *
  * @param {number} n - The number to decrement.
- * @param {number} [step=1] - The step size to decrement by. Defaults to 1.
  * @returns {number} The decremented number.
  *
  * @example
- * dec(3)       // 2
- * dec(3, 2)    // 1
+ * dec(3) // 2
+ * dec(5) // 4
  */
-export function dec(n: number, step: number = 1): number {
-  return n - step;
+
+export function dec(n: number): number {
+  return n - 1;
 }

src/number/des.spec.ts

@@ -1,17 +1,8 @@
 import { inc } from './inc';
 
 describe('inc', () => {
-  it('should increment by 1 when no step is provided', () => {
+  it('should increment by 1', () => {
     expect(inc(0)).toBe(1);
     expect(inc(5)).toBe(6);
   });
-
-  it('should increment by the given step', () => {
-    expect(inc(0, 2)).toBe(2);
-    expect(inc(5, 3)).toBe(8);
-  });
-
-  it('should handle negative steps correctly', () => {
-    expect(inc(5, -2)).toBe(3);
-  });
 });

src/number/inc.spec.ts

@@ -1,14 +1,14 @@
 /**
- * Increments a number by 1 or a specified step.
+ * Increments a number by 1.
  *
  * @param {number} n - The number to increment.
- * @param {number} [step=1] - The step size to increment by. Defaults to 1.
  * @returns {number} The incremented number.
  *
  * @example
- * inc(3)       // 4
- * inc(3, 2)    // 5
+ * inc(3) // 4
+ * inc(5) // 6
  */
-export function inc(n: number, step: number = 1): number {
-  return n + step;
+
+export function inc(n: number): number {
+  return n + 1;
 }