value-after-operation.ts

/*
2011. Final Value of Variable After Performing Operations
Easy

There is a programming language with only four operations and one variable X:

    ++X and X++ increments the value of the variable X by 1.
    --X and X-- decrements the value of the variable X by 1.

Initially, the value of X is 0.

Given an array of strings operations containing a list of operations, return the final value of X after performing all the operations.
Example 1:

Input: operations = ["--X","X++","X++"]
Output: 1
Explanation: The operations are performed as follows:
Initially, X = 0.
--X: X is decremented by 1, X =  0 - 1 = -1.
X++: X is incremented by 1, X = -1 + 1 =  0.
X++: X is incremented by 1, X =  0 + 1 =  1.

Example 2:

Input: operations = ["++X","++X","X++"]
Output: 3
Explanation: The operations are performed as follows:
Initially, X = 0.
++X: X is incremented by 1, X = 0 + 1 = 1.
++X: X is incremented by 1, X = 1 + 1 = 2.
X++: X is incremented by 1, X = 2 + 1 = 3.
*/

function finalValueAfterOperations(operations: string[]): number {
    let X: number = 0
    operations.forEach(
    x => {
        if (x.includes("-")){
            X-=1
        }else{
            X+=1
        } 
    })
    return X
};