if-else Conditional Statements in wincc scada C Programming :Syntax, Examples, and Best Practices

Published on May26, 2025 | Category: c programming

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if else is conditional statement in c programming.in c programming if, else if, and else statements in C to control the flow of your program based on conditions.in if else conditional statement and statement is executed only if condition is true otherwise else statement executed. The if,else if, and else statements in C are used to control the flow of a program based on conditions. These conditional statements help make decisions and execute code blocks accordingly. if else conditional statement allows the program to choose between two possible paths of execution based on whether the condition holds or not. This if else statement help to handling situations where you want your program to respond differently to different inputs or states, such as validating user input, controlling program flow, or triggering specific actions based on dynamic data.

basic sysntax of if else conditonal statment in wincc scada c programming

if (condition) {
    // Code runs if condition is true
} else if (another_condition) {
    // Code runs if another condition is true
} else {
    // Code runs if all conditions are false
}

Step 1: The program checks the if (condition).
- If the condition is true, the code inside this block runs.
- If the condition is false, it moves to the next step.
Step 2: The program checks the else if (another_condition).
- This is an optional check after the initial if.
- If this condition is true, the code inside this block runs.
- If it's false, it moves to the final step.
Step 3: If none of the above conditions were true, the else block executes.
- This block handles all remaining cases.
- No condition is checked here—it just runs if everything else failed.

Key Points:

You can have multiple else if conditions to handle different scenarios.
The else block is optional, but useful as a fallback.
Only one block of code will run — the first condition that is true.

example of simple if conditional statment in wincc scada c programming

if conditional statement only executed statement if condition is true. below is the simple example of if conditional statement in wincc scada c programming. in this example we check temperature value between 0 to 10. if value between 0 to 10 then statement is executed.

what is if else conditional statement in wincc scada c programming

if the condition evaluates to true, the block of code inside the if statement executes. If the condition evaluates to false, the program skips the if block and instead executes the block of code inside the else statement

above is the example of if else conditional statement. in this program check input value is even or odd. in this program inside id we set a condition if this condition is true than if statement executed and stateic text changed to even value otherwise static text set for odd value.

what is multiple if else conditional statement in wincc scada c programming

A multiple if-else statement is used when there are several conditions to check, one after another. Only the first true condition's block will be executed. If none of the conditions are true, the else block (if present) will run.

in this example we use multiple condition. This script reads a temperature value from a WinCC tag (input) and displays a message on Static Text1 based on the temperature range when a key is released.

If temperature is 40 or more, it shows: "temperature is too much high."
Else if temperature is 30 or more, it shows: "temperature reached to danger limit."
Else if temperature is 20 or more, it shows: "temperature is normal range
Else if temperature is 5 or more, it shows: "temperature is increasing."
Else (i.e. below 5), it shows: "temperature is very low"