Use a 'contains' operator within an IF/ELSE AMPScript statement

Example structure of the IndexOf() AMPScript function in an IF/ELSE statement

%%[ 
Var @String, @Value, @Output 

/* Set the value to check */ 
Set @Value= "Indianapolis" 

/* Set the string to check */ 
Set @String = "Welcome to Indianapolis, we hope you enjoy your stay!" 

/* Does it match; ; if no match, output of IndexOf(1,2) will be "0" */ 
if IndexOf(@String,@Value) > 0 then 
    Set @Output = "How was your stay in Indianapolis" 
else 
    Set @Output = "Where would you like to stay?" 
endif 

]%% 
<!-- Within the body of your email, you can print out the variable here -->
%%=v(@Output)=%%

Related Developer documentation

• AMPScript Syntax Guide
• IndexOf(1, 2)