The 如果 ⋯⋯，就⋯⋯ two-part structure is very logical and concise, Also,  is an often-used pattern that is utilized in the same way meaning "if... then...." is in English. 
In English we sometimes drop then "then" in the second half of the sentence, and you can do the same in Chinese, dropping the 就.

敢 not scared

有名 famous.

机会 chance

场 to try