C if statement Example

C if Statement; In this tutorial, i am going to show you if statement in C programming with examples.

C if Statement

In c programming, if statement is a programming conditional statement that, if proved true, performs a function or displays information.

Syntax of C if Statement

The syntax of the if statement in C programming; as shown below:

if (test expression) 
{
   // code
}

Example 1 – if Statement in C

See the following c program for if statement; as shown below:

// Program to display a number if it is negative
#include <stdio.h>
int main() {
    int number;
    printf("Enter an integer: ");
    scanf("%d", &number);
    // true if number is less than 0
    if (number < 0) {
        printf("You entered %d.\n", number);
    }
    printf("The if statement is easy.");
    return 0;
}

Output of the above c program

Enter an integer: -2
You entered -2.
The if statement is easy.

Explaination of above c program

The if statement evaluates the test expression inside the parenthesis ().

  • If the test expression is evaluated to true, statements inside the body of if are executed.
  • If the test expression is evaluated to false, statements inside the body of if are not executed.

Example 2 – if statement in c

See the second c program for if statement; as shown below:

#include <stdio.h>
int main()
{
    int x = 20;
    int y = 22;
    if (x<y)
    {
        printf("Variable x is less than y");
    }
    return 0;
}

Output of the above c program

Variable x is less than y

Explanation of above c program

  • The condition (x<y) specified in the “if” returns true for the value of x and y, so the statement inside the body of if is executed.

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