Manipulations with Arrays

You can also use for loops in arrays to find the sum of all elements:


              12345678
            
int numbers[4] = {42, 12, 56, 98};
int sum = 0;

for (int i = 0; i <= 3; i++) {
    sum += numbers[i];
}

cout << sum;

Here the variable sum will store the sum of all elements, initially, it’s equal to 0. Then we iterate through the array using for loops and add each element to the variable sum.

You can also store in arrays the data from the user:


              12345678
            
int numbers[4];
int sum = 0;

for (int i = 0; i <= 3; i++) {
    cout << "Type the number: ";
    cin >> numbers[i];
    sum += numbers[i];
}

Task

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Find the multiplication of 10 elements printed by the user. Store the result in the variable mul. Pay attention that the initial value of the variable mul is 1, since multiplication by 1 does not affect the result.

Take input from the user.
Multiply the user's number and the variable mul. Store the result in the variable mul.
Print the variable mul.

Please, don’t forget to type the semicolon ; at the end of the lines.

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Section 5. Chapter 3

Manipulations with Arrays

You can also use for loops in arrays to find the sum of all elements:


              12345678
            
int numbers[4] = {42, 12, 56, 98};
int sum = 0;

for (int i = 0; i <= 3; i++) {
    sum += numbers[i];
}

cout << sum;

Here the variable sum will store the sum of all elements, initially, it’s equal to 0. Then we iterate through the array using for loops and add each element to the variable sum.

You can also store in arrays the data from the user:


              12345678
            
int numbers[4];
int sum = 0;

for (int i = 0; i <= 3; i++) {
    cout << "Type the number: ";
    cin >> numbers[i];
    sum += numbers[i];
}

Task

Swipe to show code editor

Take input from the user.
Multiply the user's number and the variable mul. Store the result in the variable mul.
Print the variable mul.

Please, don’t forget to type the semicolon ; at the end of the lines.

Switch to desktop for real-world practiceContinue from where you are using one of the options below

Everything was clear?

Thanks for your feedback!

Section 5. Chapter 3

Switch to desktop for real-world practiceContinue from where you are using one of the options below