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Aprende If Expression | Conditional Statements
Introduction to C++

book
If Expression

To perform different actions depending on the different decisions we can use already mentioned logical operators and the conditional statement if.

if executes the block of code if the condition is true. In C++, it's implemented as follows:

if (condition) {
// code here will be executed if the condition is true
}

For example, we know how to check if the variable x is greater than y. Let’s write the message (with the statemant if) if this condition is true (x is bigger than y):

#include <iostream>
using namespace std;

int main() {
// Define variables
int x = 7;
int y = 5;

// Check the condition
if (x > y) {
cout << "x is bigger than y";
}
return 0;
}

As x is 7, and y is 5, x is greater than y, so our condition is true and the code will print the message "x is bigger than y".

The statement if is case sensitive. It means that usage of uppercase letters (If or IF) will cause an error.

question-icon

Accept the variables x and y as the input of the user. Compare the variables, and print the message “x is equal to y” if they are equal:

cin >> x;
cin >> y;
if
_ _ _
{
    
_ _ _
_ _ _
"x is equal to y";
}

Click or drag`n`drop items and fill in the blanks

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cout
dots
>>
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print
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cin
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(x=y)
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x==y
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<<
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(x == y)

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Sección 3. Capítulo 2
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