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C: 6. Decision Making If

The if-else statement in C is used to perform the operations based on some specific condition. The operations specified in if block are executed if and only if the given condition is true. 

There are the following variants of if statement in C language.

If statement

An if statement consists of a Boolean expression followed by one or more statements

Syntax:-

if(expression){  

//code to be executed  
}  
Exercises:- 
The if-else statement is used to perform two operations for a single condition. The if-else statement is an extension to the if statement using which, we can perform two different operations, i.e., one is for the correctness of that condition, and the other is for the incorrectness of the condition.

Syntax:-
if(expression){  
//code to be executed if condition is true  
}else{  
//code to be executed if condition is false  
}  

Exercises:- 
In if-else-if ladder statement, if a condition is true then the statements defined in the if block will be executed, otherwise if some other condition is true then the statements defined in the else-if block will be executed, at the last if none of the condition is true then the statements defined in the else block will be executed.

Syntax:-
if(condition1){  
//code to be executed if condition1 is true  
}else if(condition2){  
//code to be executed if condition2 is true  
}  
else if(condition3){  
//code to be executed if condition3 is true  
}  
...  
else{  
//code to be executed if all the conditions are false  
}  

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